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fix(macos): Sunday week start and UTC timezone labels like web - #4612
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Co-authored-by: Tyler Dane <tyler-dane@users.noreply.github.com>
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Co-authored-by: Tyler Dane <tyler-dane@users.noreply.github.com>
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Fixes #4331
What and why
Web week view anchors with Day.js
startOf("week")(Sunday). macOS usedweekOfYear, which is Monday-first under UTC and shifted parity compares by one day. This moves Sunday week start intoCalendarWindowMath.sundayWeekViewStartfor init, Go to Today, and parity capture (not a test-only hack).Web grid timezone abbreviations use Intl and show UTC for the UTC zone; macOS
DateFormatterzshowed GMT.TimeZoneFormatting.abbreviationnow mirrors webformatTimeZoneAbbreviation.Verify
bun run verify --strictVERDICT: PASS