Dates in week 1
- Monday — January 4, 2027
- Tuesday — January 5, 2027
- Wednesday — January 6, 2027
- Thursday — January 7, 2027
- Friday — January 8, 2027
- Saturday — January 9, 2027
- Sunday — January 10, 2027
Week 1 of 2027
Week 1 runs from Monday, January 4, 2027 through Sunday, January 10, 2027.
Week 1 at a glance
ISO weeks always run Monday through Sunday. Week 1 is the week containing the year’s first Thursday.
Browse nearby weeks
Frequently asked questions
What dates are in week 1 of 2027?
Monday, January 4, 2027 through Sunday, January 10, 2027.
Does week 1 start on Monday?
Yes. GlobalTimeGuide uses the ISO 8601 week-date system, where weeks start on Monday and end on Sunday.