2026 calendar

Reading and reusing a calendar

Every Gregorian year is one of 14 calendars, set by the weekday of January 1 and whether the year has a February 29. That is why an old calendar can be used again: 2026 began on a Thursday, and the facts table lists the other years that start on the same day and have the same number of days.

The pattern is regular but not simple. A common year moves the next January 1 one weekday later, a leap year two. Within a century the cycle repeats every 28 years, but century years that are not leap years, such as 2100, break it. Over 400 years the whole calendar repeats exactly, because 400 Gregorian years are 146,097 days, a whole number of weeks.

Week numbers in the left column follow ISO 8601, so the first week of the year can begin in late December, and the last can end in early January; the week number page lists every week with its dates. For a date’s weekday in any year from 1 to 9999, use the day of the week calculator, and to count the days between two dates on the calendar, days between dates.

Questions about the calendar