Free tool by pickmytime.io
Calendar Week Calculator
Find the current calendar week number, look up the week for any date, or browse all weeks of the year.
Current Calendar Week
CW 14
Mar 30, 2026 – Apr 5, 2026
Look Up a Date
Year Overview
2026
2026 has 53 calendar weeks
CW 1Dec 29 – Jan 4
CW 2Jan 5 – Jan 11
CW 3Jan 12 – Jan 18
CW 4Jan 19 – Jan 25
CW 5Jan 26 – Feb 1
CW 6Feb 2 – Feb 8
CW 7Feb 9 – Feb 15
CW 8Feb 16 – Feb 22
CW 9Feb 23 – Mar 1
CW 10Mar 2 – Mar 8
CW 11Mar 9 – Mar 15
CW 12Mar 16 – Mar 22
CW 13Mar 23 – Mar 29
CW 14Mar 30 – Apr 5
CW 15Apr 6 – Apr 12
CW 16Apr 13 – Apr 19
CW 17Apr 20 – Apr 26
CW 18Apr 27 – May 3
CW 19May 4 – May 10
CW 20May 11 – May 17
CW 21May 18 – May 24
CW 22May 25 – May 31
CW 23Jun 1 – Jun 7
CW 24Jun 8 – Jun 14
CW 25Jun 15 – Jun 21
CW 26Jun 22 – Jun 28
CW 27Jun 29 – Jul 5
CW 28Jul 6 – Jul 12
CW 29Jul 13 – Jul 19
CW 30Jul 20 – Jul 26
CW 31Jul 27 – Aug 2
CW 32Aug 3 – Aug 9
CW 33Aug 10 – Aug 16
CW 34Aug 17 – Aug 23
CW 35Aug 24 – Aug 30
CW 36Aug 31 – Sep 6
CW 37Sep 7 – Sep 13
CW 38Sep 14 – Sep 20
CW 39Sep 21 – Sep 27
CW 40Sep 28 – Oct 4
CW 41Oct 5 – Oct 11
CW 42Oct 12 – Oct 18
CW 43Oct 19 – Oct 25
CW 44Oct 26 – Nov 1
CW 45Nov 2 – Nov 8
CW 46Nov 9 – Nov 15
CW 47Nov 16 – Nov 22
CW 48Nov 23 – Nov 29
CW 49Nov 30 – Dec 6
CW 50Dec 7 – Dec 13
CW 51Dec 14 – Dec 20
CW 52Dec 21 – Dec 27
CW 53Dec 28 – Jan 3
Need to calculate days between two dates? Try our Date Calculator
Need to check the current time in a timezone? Try our Timezone Finder
Pro tip: With pickmytime.io, your booking page automatically handles week numbers and date formatting for your visitors. No more confusion about calendar weeks.
Frequently Asked Questions
What is a calendar week (CW)?
A calendar week is a standardized way to number weeks within a year. Under ISO 8601, weeks start on Monday and the first week of the year is the one that contains the first Thursday of January.
How many calendar weeks are in a year?
Most years have 52 calendar weeks. However, some years have 53 weeks. This happens when January 1st falls on a Thursday, or on a Wednesday in a leap year.
Why does week 1 sometimes start in December?
Under ISO 8601, week 1 is defined as the week containing the first Thursday of the new year. This means it can start as early as December 29 of the previous year.
Is this tool free to use?
Yes, the Calendar Week Calculator is completely free. It runs entirely in your browser with no account required.
Need to schedule meetings efficiently?
PickMyTime handles scheduling across timezones automatically. Share your booking page and let others pick a time that works.
Get started free