Jan 25, 2026 · 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, …

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 …

6 days ago · The rule of thumb to calculate the week number is based on the number of months from January to the last month multiplied by 4 plus the number of weeks in the current month.

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').

What Week Is It Today?

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

6 days ago · This tool helps you figure out the week number of the year. We use the ISO 8601 standard, which is a fancy way of saying that weeks start on a Monday and the first week of the year is the one …

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.

2 days ago · See what week of the year it is along our week number calendar. See the current week number to find out how far into the year we are.