Date facts
Sunday, December 13, 2026
December 13, 2026 is day 347 of 365, in ISO week 50. There are 18 days left in 2026 after this date.
Weekday
Sunday
Calendar weekday
Day of year
347
of 365
ISO week
50
Week-year 2026
Days remaining
18
In 2026
Weeks start on Monday and use ISO week numbers. Sunday is week 50 of 2026.