Date facts
Monday, January 21, 1980
January 21, 1980 is day 21 of 366, in ISO week 4. There are 345 days left in 1980 after this date.
Weekday
Monday
Calendar weekday
Day of year
21
of 366
ISO week
4
Week-year 1980
Days remaining
345
In 1980
Weeks start on Monday and use ISO week numbers. Monday is week 4 of 1980.