ISO week to dates
Week to date calculator
Enter an ISO year and week number to find the exact Monday through Sunday.
Result
October 12, 2026 - October 18, 2026
Use the ISO year, not just the calendar year
The ISO year is the year containing the week's Thursday. For example, 2025-W01 starts on Monday, December 30, 2024. The calculator rejects week 53 when the selected ISO year has only 52 weeks.