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 …

What Week Is It Today?

Jan 11, 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.

2 days ago · Check the current week number and convert between dates and week numbers on Weeknumber.com.

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.

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').

Calculate the week number of any date and find the beginning and end date of a specific week of any year.

1 day 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.

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.

Find your ISO 8601 week number—weeks start Monday and week 1 holds January 4. Perfect for sprints, payroll, logistics.