fix: update first day logic for months starting on Sunday (#3896)

* Update calendar logic to accomodate for months starting on Sunday

* Apply suggestions from code review

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Co-authored-by: boojack <stevenlgtm@gmail.com>
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RoccoSmit 2024-09-09 11:19:12 +10:00 committed by GitHub
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@ -39,7 +39,7 @@ const ActivityCalendar = (props: Props) => {
const year = dayjs(monthStr).toDate().getFullYear();
const month = dayjs(monthStr).toDate().getMonth() + 1;
const dayInMonth = new Date(year, month, 0).getDate();
const firstDay = (new Date(year, month - 1, 1).getDay() - weekStartDayOffset) % 7;
const firstDay = ((new Date(year, month - 1, 1).getDay() - weekStartDayOffset) % 7 + 7) % 7;
const lastDay = new Date(year, month - 1, dayInMonth).getDay() - weekStartDayOffset;
const WEEK_DAYS = [t("days.sun"), t("days.mon"), t("days.tue"), t("days.wed"), t("days.thu"), t("days.fri"), t("days.sat")];
const weekDays = WEEK_DAYS.slice(weekStartDayOffset).concat(WEEK_DAYS.slice(0, weekStartDayOffset));