List Formatting - setValue and @now sets wrong date for EN-IE locale

[michelcarlo]

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

Declarative list formatting

Developer environment

Windows

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

Windows version with default locale to EN-IE, browser the same.

Describe the bug / error

When using the setValue functionality in list formatting and the @now token to set date and time, seems it always converts to american format, even when the browser locale/site settings are in other locale (EN-IE in my case).

For example, if @now was 12th of January 2024, it would be setting the value to 1st of December 2024.

And today as it is 23rd of January, as it seems that the function would use 23 as the month, I get an error:

When using a string on UTC format like in this sample I submitted, everything works fine:
https://github.com/pnp/List-Formatting/tree/master/column-samples/date-button-setValue-today

Steps to reproduce

1. Create a Date Field named 'DateTripCompleted' in a List
2. Apply below formatting JSON to the field
3. Add a list item without a a value in this field
4. Click the button displayed in the Field from the List View
   { "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json", "elmType": "div", "children": [ { "elmType": "span", "txtContent": "[$DateTripCompleted.displayValue]", "attributes": { "class": "ms-fontColor-themePrimary ms-fontColor-themeDarker--hover" }, "style": { "display": "=if(Number([$DateTripCompleted]) ==0,'none','flex')" } }, { "elmType": "button", "customRowAction": { "action": "setValue", "actionInput": { "DateTripCompleted": "@now" } }, "attributes": { "class": "ms-fontColor-themePrimary ms-fontColor-themeDarker--hover" }, "style": { "border": "none", "background-color": "transparent", "cursor": "pointer", "display": "=if(Number([$DateTripCompleted]) ==0,'flex','none')", "align-items": "center" }, "children": [ { "elmType": "span", "attributes": { "iconName": "EventAccepted" }, "style": { "padding-right": "6px" } }, { "elmType": "span", "txtContent": "Mark Trip as Complete" } ] } ] }

Expected behavior

Value of date field to be set correctly.

Thank you for reporting this issue. We will be triaging your incoming issue as soon as possible.

[michelcarlo]

I spoke to a community member this week regarding this issue, in the fr-ca locale not even with my approach I highlighted of using a string in UTC format it works....Users are not able to update date fields in any format:

Adding to the thread as it seems to relate to the same issue.

[mcastaneda-Assa]

Bumped into this issue, fixed it using:

"Date": "=toString(Date(@now))"