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Guides

Short explanations of the rules behind the numbers on this site.

How the date of Easter is calculatedWhy Easter moves between March 22 and April 25, and the rule behind it.ISO week numbers explainedHow week 1 is chosen, why some years have 53 weeks, and how it differs from US calendars.How to count business daysWhat counts as a business day, how to count them, and the common mistakes.
HolidaysDays until ChristmasWeeks until ChristmasDays until New YearDays until DiwaliDays until EasterAll holidays
From today30 days from today60 days from today90 days from today6 weeks from today6 months from today90 days ago
Year planningWeeks left in the yearDays left in the yearWhat week is it?2027 calendar
CalculatorsDays until any dateWeeks until any dateMonths until any dateDays since any dateDate duration
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