Date Utilities by FailFlow
Weeks UntilDays UntilDate DurationTools

When is week 1?

Week 1 of 2027 runs
January 4 – January 10, 2027
Monday to Sunday — starts in 121 days
Week 1 of 2027 runs from Monday, January 4, 2027 to Sunday, January 10, 2027. It is currently week 36 of 53 in 2026 (today is Saturday, September 5, 2026). Week numbers follow ISO 8601. This page recalculates on every visit.
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Week 1 by year:
2024January 1 – January 7, 2024
2025December 30, 2024 – January 5, 2025
2026December 29, 2025 – January 4, 2026
2027January 4 – January 10, 2027
2028January 3 – January 9, 2028
2029January 1 – January 7, 2029
2030December 31, 2029 – January 6, 2030
2031December 30, 2030 – January 5, 2031
2032December 29, 2031 – January 4, 2032
When is week 2?
All week numbers for 2027
What week is it now?

When is week 1 of 2027?

Week 1 of 2027 runs from Monday, January 4, 2027 to Sunday, January 10, 2027.

How many days until week 1?

Week 1 of 2027 starts in 121 days, on Monday, January 4, 2027.

What week is it right now?

It is currently week 36 of 53 in 2026 (today is Saturday, September 5, 2026).

Is week 1 the same in every country?

These are ISO 8601 week numbers (weeks start Monday; week 1 holds the year's first Thursday), the standard in Europe and in Excel's ISOWEEKNUM. The US convention (Excel's WEEKNUM) starts week 1 on January 1 with weeks starting Sunday, so its numbers can be one higher.

When Is Week 1? Week 1 Dates