Date facts
Tuesday, December 21, 1999
December 21, 1999 is day 355 of 365, in ISO week 51. There are 10 days left in 1999 after this date.
Weekday
Tuesday
Calendar weekday
Day of year
355
of 365
ISO week
51
Week-year 1999
Days remaining
10
In 1999
Weeks start on Monday and use ISO week numbers. Tuesday is week 51 of 1999.