Date facts
Wednesday, December 31, 1980
December 31, 1980 is day 366 of 366, in ISO week 1. There are 0 days left in 1980 after this date.
Weekday
Wednesday
Calendar weekday
Day of year
366
of 366
ISO week
1
Week-year 1981
Days remaining
0
In 1980
Weeks start on Monday and use ISO week numbers. Wednesday is the first week of 1981.