๐ What Week Is It?
Current week number and calendar information
About Week Numbers
Week numbers follow the ISO 8601 standard, where weeks start on Monday and the first week of the year contains January 4th.
The ISO week numbering system ensures consistent week counting across different countries and organizations.
Frequently Asked Questions
What week of the year is it right now?
The current ISO week number is displayed above. Week numbers range from 1 to 52 (or 53 in some years), following the ISO 8601 standard.
How are ISO week numbers calculated?
ISO weeks start on Monday. Week 1 is the week containing January 4th, or the week with the year's first Thursday.
Why do some years have 53 weeks?
Years that start on Thursday (or Wednesday in leap years) have 53 weeks. This happens roughly every 5-6 years.
What is the difference between calendar week and ISO week?
Calendar weeks vary by country - some start on Sunday (US), others on Monday (Europe). ISO weeks always start on Monday.
How do I use week numbers for project planning?
Week numbers simplify scheduling. Instead of "the week of March 15th," say "Week 11." Useful for meetings and deadlines.
What week number is a specific date?
Use our Week Number Calculator to find the ISO week for any date. Enter the date and get the week number instantly.