feat: standardize date format to ISO 8601 #12398

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1. github-actions

   assigned

   thdxr

   on Feb 6, 2026
2. github-actions commented on Feb 6, 2026

   

   github-actionsBot

   on Feb 6, 2026 – with GitHub Actions

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   This issue might be a duplicate of existing issues. Please check:

   • feat: standardize date format to ISO 8601 (YYYY-MM-DD) #6450: standardize date format to ISO 8601 (YYYY-MM-DD) - Previously closed, this appears to be reopening or re-addressing that work
   • Session timestamps display in UTC instead of local time #9025: Session timestamps display in UTC instead of local time - Related locale/timezone issues
   • Add option to use 24-hour time format in session view #7208: Add option to use 24-hour time format in session view - Related time format customization
   • Updating a session's metadata ought not update the timestamp #9494: Updating a session's metadata ought not update the timestamp - Related timestamp handling concerns
   • Zen: Workspace - Missing 31 Jan data, incorrect label in Asia/Singapore timezone in "Usage costs broken down by model" #11606: Timezone-specific date display issues in usage costs (Asia/Singapore timezone)

   Feel free to ignore if none of these address your specific case.
3. ariane-emory commented on Feb 6, 2026

   

   ariane-emory

   on Feb 6, 2026

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   This seems undesirable to me. I want OpenCode to format the dates in my country's date format, not in some other international format that I do not use.

   👍React with 👍1Reacted by Antonio Dell'Elce

   👎React with 👎4Reacted by scarf, yilisharcs, Olivier Verdier and Yuri Khan
4. aniasse

   added 2 commits that reference this issue on Feb 27, 2026

   fix: standardize date format to ISO 8601

   ...

   This issue will close once commit 2162e68 is merged into the 'dev' branch.

   2162e68

   fix(opencode): standardize date format to ISO 8601

   ...

   This issue will close once commit 27feccc is merged into the 'dev' branch.

   27feccc
5. github-actions commented on Apr 7, 2026

   

   github-actionsBot

   on Apr 7, 2026 – with GitHub Actions

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   To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.
6. github-actions

   closed this as completedon Apr 7, 2026