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
30
ISO week-year
2026
Working days
5
Weekend days
2
Range
Monday, July 20, 2026
through
Sunday, July 26, 2026
Days in week
Monday, July 20, 2026
Tuesday, July 21, 2026
Wednesday, July 22, 2026
Thursday, July 23, 2026
Friday, July 24, 2026
Saturday, July 25, 2026
Sunday, July 26, 2026
Full report
Week Number Calculation Results: Week 30, 2026 Week Range: First Day: Monday, July 20, 2026 Last Day: Sunday, July 26, 2026 Days in Week: Monday, July 20, 2026 Tuesday, July 21, 2026 Wednesday, July 22, 2026 Thursday, July 23, 2026 Friday, July 24, 2026 Saturday, July 25, 2026 Sunday, July 26, 2026 Summary: Total Days: 7 Working Days: 5 Weekend Days: 2