Jan 4, 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.

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.

1 minute ago · 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 …

What Week Is It Today?

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').

2 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.

6 days ago · View the current week no, its date range, and how many weeks left in this year. Find the number of the week for a specific date. See the date range for any week in a specific year. …

Jan 4, 2026 · Find the ISO week number for any date. See which week of the year it is and the date range for that week.

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