calendar with week numbers



WK   Mo Tu We Th Fr Sa Su

Week numbers according to iso8601
print notes:

The notes are only temporary but can you print this page together with the notes.

Calculate day and week number for a given date

yyyy-mm-dd: - -


day of week:
iso8601 week number:

Background about ISO 8601

ISO 8601 defines the Week as always starting with Monday. The first week is the week which contains the first Thursday of the calendar year. This implies that it is the week which is mostly within the Calendar year and the week containing January 4th.

This page is operting system independent. It only requires a javascript capable webbrowser. You can install it locally on your PC just by saving this html page.

© Guido Socher, License: GPL, guidosocher at, Version: 2009-11-13