The activity calendar and the link preview's calendar now start weeks on Monday. Rows run Mon to Sun, so Saturday and Sunday are always the bottom two rows. This matches the site's other Monday weeks.
Row labels are MON, WED, FRI and SUN on every other row, so labels never crowd at the 1y cell size and the weekend's bottom row is named.
Checked every period at 1280 and 420 px, both themes, with live data: every cell sits in its weekday's row, today (Mon Nov 9, New York) is the top row of the last week, the phone calendar still scrolls to the newest week, no console errors. Tests, clippy and fmt pass.
Before / after (90d):
🤖 Generated with Claude Code