Date facts
Monday, December 31, 1979
December 31, 1979 is day 365 of 365, in ISO week 1. There are 0 days left in 1979 after this date.
Weekday
Monday
Calendar weekday
Day of year
365
of 365
ISO week
1
Week-year 1980
Days remaining
0
In 1979
Weeks start on Monday and use ISO week numbers. Monday is the first week of 1980.