5 days ago · See here which week number this week has. On this website we've also listed annual and monthly calendars including 2026, 2027 and 2028.

There are just over 52 weeks in a year. The term "week" may also be used to refer to a sub-section of the week, such as the workweek and weekend. Ancient cultures had different "week" lengths, …

What Week Is It Today?

Check the current week number and convert between dates and week numbers on Weeknumber.com.

Dec 28, 2025 · Each week of the year is marked with a number, making it easy to keep track of the progression of time. Week numbers are also helpful for calculating the time distance between events …

Week number according to the ISO-8601 standard, weeks starting on Monday. The first week of the year is the week that contains that year's first Thursday (='First 4-day week').

4 days ago · Find the current week number, look up the week number of any date, or convert week number to date ranges.

4 days ago · It doesn't matter whether a year has 52 weeks or 53 weeks: The first calendar week of the year is always the week of the 4th of January, or the week of the first Thursday of the year.

Sunday is the first day of week and Saturday if the last day of the week. The first week of the year is the week that contains January 4th, first 4 days of the year.

5 days ago · Quickly find out what week of the year it is right now, or check the week number for any specific date. Accurate and easy-to-use ISO week calculator.