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DateDelta
The three-part divisibility rule behind why some century years (like 1900) aren't leap years.
A pure 'every 4 years' rule would add too many days over centuries, drifting the calendar out of sync with the seasons. The Gregorian calendar corrects for this by skipping leap years in century years not divisible by 400 — so 1900 wasn't a leap year, but 2000 was.
Earth takes about 365.2422 days to orbit the sun, not exactly 365. Without leap years, the calendar would drift about 1 day off from the seasons every 4 years, and after a few centuries, seasons would shift entirely.
Duration between two times of day, in hours and minutes.
OpenHours worked from clock-in, clock-out, and break time.
OpenWeekly total hours and overtime from daily entries.
OpenAnnual cost of your daily commute.
OpenLeap year?
No
A year is a leap year if divisible by 4, except centuries not divisible by 400.
What you entered
Divisible by 4?
2026 ÷ 4= noDivisible by 100?
2026 ÷ 100= noDivisible by 400?
2026 ÷ 400= noLeap year rule: div by 4 AND (not div by 100 OR div by 400)
apply the rule= Not a leap yearResult
Leap year?: No
2026 is not a leap year, so it has 365 days.