Date facts
Thursday, January 31, 1980
January 31, 1980 is day 31 of 366, in ISO week 5. There are 335 days left in 1980 after this date.
Weekday
Thursday
Calendar weekday
Day of year
31
of 366
ISO week
5
Week-year 1980
Days remaining
335
In 1980
Weeks start on Monday and use ISO week numbers. Thursday is week 5 of 1980.