ISO week calendar
Week 15 2027
ISO week 15 of 2027 runs from Monday, April 12, 2027 to Sunday, April 18, 2027.
Date Time Encyclopedia answer, with calculation details and assumptions below.
ISO weeks start on Monday and end on Sunday. Week 1 is the week containing the first Thursday of the ISO week-numbering year.
Snapshot
Week 15 2027
ISO week 15 of 2027 runs from Monday, April 12, 2027 to Sunday, April 18, 2027.
ISO weeks start on Monday and end on Sunday. Week 1 is the week containing the first Thursday of the ISO week-numbering year.
- Week starts
- Monday, April 12, 2027
- Week ends
- Sunday, April 18, 2027
- ISO year
- 2027
- Weeks in ISO year
- 52
ISO week 15, 2027
- MonApr 12, 2027Week start
- TueApr 13, 20272027-W15
- WedApr 14, 20272027-W15
- ThuApr 15, 20272027-W15
- FriApr 16, 20272027-W15
- SatApr 17, 20272027-W15
- SunApr 18, 2027Week end
Method
Find the Monday of ISO week 1, then add seven days for each week after it.
ISO week context
Week 15 2027 uses the ISO week-date system: weeks start Monday, end Sunday, and week 1 is tied to the first Thursday of the ISO year.
Compare nearby ISO weeks
Adjacent week pages help verify handoffs between reporting periods, sprints, payroll periods, and weekly plans.
Related Lookups
FAQ
When does this ISO week start?
Week 15 of 2027 starts on Monday, April 12, 2027.
When does this ISO week end?
Week 15 of 2027 ends on Sunday, April 18, 2027.