Time & Date Tools
Week Number Calculator
Calculate ISO week number and get detailed week information for any date
Pick a date
Week boundaries follow ISO week (Monday–Sunday). Week number and ISO week-year come from your selection.
ISO week
Week number
23
ISO week-year
2026
Working days
5
Weekend days
2
Range
Monday, June 1, 2026
through
Sunday, June 7, 2026
Days in week
Monday, June 1, 2026
Tuesday, June 2, 2026
Wednesday, June 3, 2026
Thursday, June 4, 2026
Friday, June 5, 2026
Saturday, June 6, 2026
Sunday, June 7, 2026
Full report
Week Number Calculation Results: Week 23, 2026 Week Range: First Day: Monday, June 1, 2026 Last Day: Sunday, June 7, 2026 Days in Week: Monday, June 1, 2026 Tuesday, June 2, 2026 Wednesday, June 3, 2026 Thursday, June 4, 2026 Friday, June 5, 2026 Saturday, June 6, 2026 Sunday, June 7, 2026 Summary: Total Days: 7 Working Days: 5 Weekend Days: 2