Date → Week Number
ISO week
Day of year
200
Day of week
Sunday
Weeks in 2026
53
Sunday, July 19, 2026 is in ISO Week 29 of 2026. There are 165 days left in the year.
Week Number → Dates
Week 29 of 2026 is Mon, Jul 13 – Sun, Jul 19, 2026
Mon
13
Jul
Tue
14
Jul
Wed
15
Jul
Thu
16
Jul
Fri
17
Jul
Sat
18
Jul
Sun
19
Jul
Results
Export week number
How to use
Follow these steps to get a result
Pick a date (or tap Today) to see its ISO week number.
Read day-of-year, weekday, and how many weeks that year has.
Use Week → Dates to look up Monday–Sunday for any year and week.
Export the week result and lookup range (Copy / CSV / PDF).
Features
What this tool includes
ISO 8601 week numbers
Date → week and week → date range
Day of year and days remaining
7-day week calendar strip
Exportable week snapshot
FAQ
Common questions about this tool
Related tools
Continue with something nearby