Week Number Calendar 2025 Starting Monday. If you include the end date of sep 15, 2025 which is a monday, then there would be 206 weekdays and 83 weekend days including both the starting sunday and the ending. The calendar can be easily printed or viewed online.

Compare week numbers for three different week numbering systems, including iso8601. Here you find a list of all week numbers 2025 for the united kingdom (uk).