diff --git a/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceJsonWriter.cs b/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceJsonWriter.cs
index 4710f00a2e..74363c8ca1 100644
--- a/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceJsonWriter.cs
+++ b/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceJsonWriter.cs
@@ -46,8 +46,8 @@ public static void WriteTrace(
 
                 if (isRootTrace)
                 {
-                    writer.WriteFieldName("start time");
-                    writer.WriteStringValue(trace.StartTime.ToString(TraceWriter.HourTimeFormatString));
+                    writer.WriteFieldName("start datetime");
+                    writer.WriteStringValue(trace.StartTime.ToString(TraceWriter.DateTimeFormatString));
                 }
                 writer.WriteFieldName("duration in milliseconds");
                 writer.WriteNumber64Value(trace.Duration.TotalMilliseconds);
diff --git a/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceTextWriter.cs b/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceTextWriter.cs
index f77307b359..502c87c4fe 100644
--- a/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceTextWriter.cs
+++ b/Microsoft.Azure.Cosmos/src/Tracing/TraceWriter.TraceTextWriter.cs
@@ -18,6 +18,7 @@ namespace Microsoft.Azure.Cosmos.Tracing
     internal static partial class TraceWriter
     {
         internal static readonly string HourTimeFormatString = "HH:mm:ss:fff";
+        internal static readonly string DateTimeFormatString = "yyyy-MM-ddTHH:mm:ss.fffZ";
 
         private static class TraceTextWriter
         {
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BatchOperationsAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BatchOperationsAsync.xml
index 59a5eabf76..d468fe87f5 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BatchOperationsAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BatchOperationsAsync.xml
@@ -61,7 +61,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ExecuteAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BulkOperationsAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BulkOperationsAsync.xml
index b99e457c3b..ed39221a61 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BulkOperationsAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.BulkOperationsAsync.xml
@@ -60,7 +60,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -218,7 +218,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -376,7 +376,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -534,7 +534,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -692,7 +692,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -850,7 +850,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1008,7 +1008,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1166,7 +1166,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1324,7 +1324,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1482,7 +1482,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1796,7 +1796,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ChangeFeedAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ChangeFeedAsync.xml
index 1415343fc9..dccb7fe5d0 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ChangeFeedAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ChangeFeedAsync.xml
@@ -238,7 +238,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1124,7 +1124,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1738,7 +1738,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -2340,7 +2340,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -2888,7 +2888,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.MiscellanousAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.MiscellanousAsync.xml
index a6a935fe01..832dfee446 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.MiscellanousAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.MiscellanousAsync.xml
@@ -44,7 +44,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateDatabaseAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -154,7 +154,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateDatabaseAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.PointOperationsExceptionsAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.PointOperationsExceptionsAsync.xml
index c409236892..200ad02660 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.PointOperationsExceptionsAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.PointOperationsExceptionsAsync.xml
@@ -68,7 +68,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -254,7 +254,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -514,7 +514,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -750,7 +750,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1029,7 +1029,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -1267,7 +1267,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.QueryAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.QueryAsync.xml
index ba77a115a1..876d37dc63 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.QueryAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.QueryAsync.xml
@@ -163,7 +163,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -753,7 +753,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1356,7 +1356,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1947,7 +1947,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -2577,7 +2577,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -3227,7 +3227,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -3827,7 +3827,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadFeedAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadFeedAsync.xml
index be14de122e..44a8a04a51 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadFeedAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadFeedAsync.xml
@@ -139,7 +139,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -691,7 +691,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1256,7 +1256,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1809,7 +1809,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace Forest",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadManyAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadManyAsync.xml
index 5b8f8e29a0..9a96ef9751 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadManyAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.ReadManyAsync.xml
@@ -138,7 +138,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ReadManyItemsStreamAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -696,7 +696,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ReadManyItemsAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.StreamPointOperationsAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.StreamPointOperationsAsync.xml
index 8f2ad00f94..25a01f6b94 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.StreamPointOperationsAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.StreamPointOperationsAsync.xml
@@ -41,7 +41,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemStreamAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -130,7 +130,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ReadItemStreamAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -227,7 +227,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ReplaceItemStreamAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -319,7 +319,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "DeleteItemStreamAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.TypedPointOperationsAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.TypedPointOperationsAsync.xml
index 603fec2b24..4dfceee978 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.TypedPointOperationsAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.EmulatorTests/BaselineTest/TestBaseline/EndToEndTraceWriterBaselineTests.TypedPointOperationsAsync.xml
@@ -43,7 +43,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "CreateItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -151,7 +151,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ReadItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -254,7 +254,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "ReplaceItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
@@ -354,7 +354,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "DeleteItemAsync",
-  "start time": "00:00:00:000",
+  "start datetime": "0001-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Configuration": "Redacted To Not Change The Baselines From Run To Run"
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.ScenariosAsync.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.ScenariosAsync.xml
index eecc33b72f..27ddc7bc78 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.ScenariosAsync.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.ScenariosAsync.xml
@@ -127,7 +127,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -764,7 +764,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -1222,7 +1222,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.Serialization.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.Serialization.xml
index 97da26d813..cb40e85130 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.Serialization.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.Serialization.xml
@@ -16,7 +16,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0
 }]]></Json>
     </Output>
@@ -71,7 +71,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "QueryMetrics": "Retrieved Document Count                 :           2,000             \r\nRetrieved Document Size                  :       1,125,600 bytes       \r\nOutput Document Count                    :           2,000             \r\nOutput Document Size                     :       1,125,600 bytes       \r\nIndex Utilization                        :          100.00 %           \r\nTotal Query Execution Time               :           33.67 milliseconds\r\n  Query Preparation Time                 :            0.19 milliseconds\r\n  Index Lookup Time                      :            0.36 milliseconds\r\n  Document Load Time                     :            9.58 milliseconds\r\n  Runtime Execution Times                :            0.12 milliseconds\r\n  Document Write Time                    :           18.10 milliseconds\r\n\r\nIndex Utilization Information\r\n  Utilized Single Indexes\r\n    Index Spec: IndexDocumentExpression\r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n  Potential Single Indexes\r\n    Index Spec: IndexDocumentExpression\r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n  Utilized Composite Indexes\r\n    Index Spec: \r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n  Potential Composite Indexes\r\n    Index Spec: \r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n"
@@ -100,7 +100,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -165,7 +165,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -205,7 +205,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -312,7 +312,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
@@ -404,7 +404,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "children": [
     {
diff --git a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.TraceData.xml b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.TraceData.xml
index 96c67772e6..d3b996a0e9 100644
--- a/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.TraceData.xml
+++ b/Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/BaselineTest/TestBaseline/TraceWriterBaselineTests.TraceData.xml
@@ -38,7 +38,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Point Operation Statistics": {
@@ -97,7 +97,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Point Operation Statistics Default": {
@@ -172,7 +172,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Query Metrics": "Retrieved Document Count                 :           2,000             \r\nRetrieved Document Size                  :       1,125,600 bytes       \r\nOutput Document Count                    :           2,000             \r\nOutput Document Size                     :       1,125,600 bytes       \r\nIndex Utilization                        :          100.00 %           \r\nTotal Query Execution Time               :           33.67 milliseconds\r\n  Query Preparation Time                 :            0.19 milliseconds\r\n  Index Lookup Time                      :            0.36 milliseconds\r\n  Document Load Time                     :            9.58 milliseconds\r\n  Runtime Execution Times                :            0.12 milliseconds\r\n  Document Write Time                    :           18.10 milliseconds\r\n\r\nIndex Utilization Information\r\n  Utilized Single Indexes\r\n    Index Spec: IndexDocumentExpression\r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n  Potential Single Indexes\r\n    Index Spec: IndexDocumentExpression\r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n  Utilized Composite Indexes\r\n    Index Spec: \r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n  Potential Composite Indexes\r\n    Index Spec: \r\n    Index Impact Score: IndexImpactScore\r\n    ---\r\n"
@@ -279,7 +279,7 @@
     "RegionsContacted": 2
   },
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Side Request Stats": {
@@ -480,7 +480,7 @@
     "RegionsContacted": 1
   },
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Side Request Stats Default": {
@@ -616,7 +616,7 @@
     }
   },
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "Client Side Request Stats": {
@@ -691,7 +691,7 @@
       <Json><![CDATA[{
   "Summary": {},
   "name": "Trace For Baseline Testing",
-  "start time": "00:00:00:000",
+  "start datetime": "0544-01-01T00:00:00Z",
   "duration in milliseconds": 0,
   "data": {
     "System Info": {