some more improvements

2026-09-15 15:14:18 +01:00
parent 833a34049e
commit 78f456bf77
8 changed files with 94 additions and 41 deletions
@@ -53,7 +53,11 @@ export function addDaysStr(dateStr: string, days: number): string {
 export function weekStart(payday: number, tz: string): string {
  const today = todayInTz(tz);
  const wd = weekdayInTz(new Date(), tz);
-  const back = (((wd - payday) % 7) + 7) % 7;
+  const sincePayday = (((wd - payday) % 7) + 7) % 7;
+  // The week CLOSES on payday, so it opens the day after: a payday itself
+  // belongs to the week ending that day (sincePayday 0 → back 6), e.g.
+  // payday Sunday → weeks run Monday..Sunday.
+  const back = sincePayday === 0 ? 6 : sincePayday - 1;
  return addDaysStr(today, -back);
 }