Number of week   |   What week   |   Week number

Which week was it?

Historic or future week number!

Search for a historic or future date and see what week number it was.

WHich week | Search for week

Weeks in a Gregorian calendar year can be numbered for each year. This style of numbering is commonly used (for example, by schools and businesses) in some European and Asian countries, but rare elsewhere.

ISO week date system

ISO 8601 includes the ISO week date system, a numbering system for weeks, each week begins on a Monday and is associated with the year that contains that week's Thursday (so that if a year starts in a long weekend Friday to Sunday, week number one of the year will start after that).

First day of week

The week number above starts with a monday and shows the correct week (yellow on image) for most of europe, big part of asia (except china, japan, south korea)

First day of week

International sites
- Viikko - Mikä viikko - Vilken vecka - Veckonummer - Uge - Hvilken uge - Hvilken uke - Ukenummer - Number of week - What week is it now - Which week - Current week number