There are just over 52 weeks in a year, or on average 4⁄3 weeks in a month. The days of the week are often used to set work days, rest days, and holy days. The term "week" may also be used to refer to a sub-section of the week, such as the workweek and weekend.

The meaning of WEEK is any of a series of 7-day cycles used in various calendars; especially : a 7-day cycle beginning on Sunday and ending on Saturday. How to use week in a sentence.

A simple app to display the work week number and day of the week.

Calculate the week number of any date and find the beginning and end date of a specific week of any year.

Budget meetings are happening in Springfield this week. Bumber will run for Navy next season. As talk of moratoriums on data centers happened throughout Central Illinois this week, Governor Pritzker spoke on the need for more regulations on data centers in the state.

Find out the current week number of the year according to the ISO 8601 standard. This page also provides programming routines in various languages to calculate week numbers for any date.

On the page we will always update the week number, so you have every time the latest number. In the list below you can find every week number of this year. Are you looking for a number for another year? Take a look at one of the calendar pages, start your search via this year's 2026 calendar.