Let the Date constructor try to parse the date string first.

`new Date(dateString)` should produce valid date objects from all
datestrings in the google calendar JSON. However, keep around the old
regex-based parsing as a fallback anyway.

jquery.gcal_flow.coffee

@@ -115,29 +115,34 @@ class gCalFlow
     }
 
   parse_date: (dstr) ->
-    if m = dstr.match /^(\d{4})-(\d{2})-(\d{2})$/
-      return new Date(parseInt(m[1], 10), parseInt(m[2], 10) - 1, parseInt(m[3], 10), 0, 0, 0)
-
-    offset = (new Date()).getTimezoneOffset() * 60 * 1000
-    year = mon = day = null
-    hour = min = sec = 0
-    if m = dstr.match /^(\d{4})-(\d{2})-(\d{2})[T ](\d{2}):(\d{2}):(\d{2}(?:\.\d+)?)(Z|([+-])(\d{2}):(\d{2}))$/
-      year = parseInt m[1], 10
-      mon = parseInt m[2], 10
-      day = parseInt m[3], 10
-      hour = parseInt m[4], 10
-      min = parseInt m[5], 10
-      sec = parseInt m[6], 10
-      if m[7] != "Z"
-        offset += (if m[8] is "+" then 1 else -1) * (parseInt(m[9], 10) * 60 + parseInt(m[10], 10)) * 1000 * 60
+    date = new Date dstr
+    unless isNaN date.getTime()
+      log.debug date
+      return date
     else
-      log.warn "Time prase error! Unknown time pattern: #{dstr}"
-      return new Date(1970, 1, 1, 0, 0, 0)
+      if m = dstr.match /^(\d{4})-(\d{2})-(\d{2})$/
+        return new Date parseInt(m[1], 10), parseInt(m[2], 10) - 1, parseInt(m[3], 10), 0, 0, 0
 
-    log.debug "time parse (gap to local): #{offset}"
-    ret = new Date(new Date(year, mon - 1, day, hour, min, sec).getTime() - offset)
-    log.debug "time parse: #{dstr} -> ", ret
-    ret
+      offset = (new Date()).getTimezoneOffset() * 60 * 1000
+      year = mon = day = null
+      hour = min = sec = 0
+      if m = dstr.match /^(\d{4})-(\d{2})-(\d{2})[T ](\d{2}):(\d{2}):(\d{2}(?:\.\d+)?)(Z|([+-])(\d{2}):(\d{2}))$/
+        year = parseInt m[1], 10
+        mon = parseInt m[2], 10
+        day = parseInt m[3], 10
+        hour = parseInt m[4], 10
+        min = parseInt m[5], 10
+        sec = parseInt m[6], 10
+        if m[7] != "Z"
+          offset += (if m[8] is "+" then 1 else -1) * (parseInt(m[9], 10) * 60 + parseInt(m[10], 10)) * 1000 * 60
+      else
+        log.warn "Time parse error! Unknown time pattern: #{dstr}"
+        return new Date 1970, 1, 1, 0, 0, 0
+
+      log.debug "time parse (gap to local): #{offset}"
+      ret = new Date(new Date(year, mon - 1, day, hour, min, sec).getTime() - offset)
+      log.debug "time parse: #{dstr} -> ", ret
+      return ret
 
   render_data: (data) ->
     log.debug "start rendering for data:", data