Date facts
Sunday, January 4, 2026
January 4, 2026 is day 4 of 365, in ISO week 1. There are 361 days left in 2026 after this date.
Weekday
Sunday
Calendar weekday
Day of year
4
of 365
ISO week
1
Week-year 2026
Days remaining
361
In 2026
Weeks start on Monday and use ISO week numbers. Sunday is the first week of 2026.