Week 1, 2026
ISO-8601 Standard Week
Week 1 of 2026 runs from January 5, 2026 to January 11, 2026, and 2026 has 53 weeks in total.
This week is already in the past. See the full 2026 calendar, or learn why some years have 53 weeks.
Starts On
Monday
January 05, 2026
Ends On
Sunday
January 11, 2026
This week marks approximately 1% of the year 2026 passed.
January 2026 Calendar
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 1 | 29 | 30 | 31 | 1 | 2 | 3 | 4 |
| 2 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 3 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 4 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 5 | 26 | 27 | 28 | 29 | 30 | 31 | 1 |
Holidays in Week 1
All Weeks in 2026
Week 1 in Other Years
Compare dates and holidays for week 1 across different years:
About Week 1
Week 1 of 2026 is a standard business week consisting of 7 days. It follows the ISO-8601 convention where Monday is the first day of the week.
Working Days
In most countries, this week contains 5 working days (Monday, January 05 to Friday, January 09) and a standard 2-day weekend.