[Bug]: Custom snooze calendar always starts the week on Sunday

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#12,737 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
68/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
typescript
Domain
frontend

Research direction

Start in apps/web by reproducing the issue through a thread’s snooze menu and its Custom date picker, then trace the calendar configuration that determines weekday order. Done means the calendar follows the user’s locale or provides a way to choose the first day of the week, with Monday no longer forced to Sunday-first.

Written by the indexing model from the issue text.

Description

accepted bug via-triage
Before submitting
  • I searched existing issues and did not find a duplicate.
  • I included enough detail to reproduce or investigate the problem.
Area

apps/web

Steps to reproduce
  1. Open a thread’s snooze menu.
  2. Select Custom…
  3. Open the date picker.
  4. Look at the weekday order.
Expected behavior

The calendar should follow the user’s locale or provide a way to choose the first day of the week. I expect Monday to be the first day.

Actual behavior

Sunday is always shown as the first day.

Impact

Cosmetic issue

Version or commit

0.0.43-nightly.20260920.1990

Environment

Windows 11

Logs or stack traces

Screenshots, recordings, or supporting files

image.png

Workaround

No response

Dominant language
TypeScript
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Merged PRs (30d)
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