Calendar & Year Progress
Week of the Year Calculator
Find out what week of the year it is today (Week 1 to 52/53). Official ISO 8601 calendar week numbers with week start and end dates.
Date & Age Calculator
Total Calendar Days364 Days
Working Business Days260 Work Days
Frequently Asked Questions
What is an ISO week number?
Under the ISO 8601 international standard, weeks begin on Monday and Week 1 of the year is defined as the week that contains the first Thursday of January.
Can a year have 53 weeks?
Yes! A year has 53 ISO weeks if January 1 falls on a Thursday (or Wednesday in a leap year).
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