Date reference
December 21, 1998 is a Monday
December 21, 1998 is the 3rd Monday of December 1998 and the 355th day of the year.
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Links related to Monday, December 21, 1998
These links connect the date to its weekday, month, calendar, and related pattern pages.
Calendar for December 1998
Use the monthly calendar to see this date in context and move to nearby days.
Use the monthly calendar below to see where December 21, 1998 sits inside December 1998.
- December 1998 started on Tuesday and ended on Thursday.
- December 1998 had 4 Mondays.
- There were 10 days remaining in 1998 after this date.
- 1998 was not a leap year.
Related patterns
These pattern pages widen the search from one exact date into recurring calendar relationships.
Same 31-day layout and opening Tuesday.
Years with same calendar as year 1998 21 matching yearsSame leap-year status and January 1 weekday.
Months that have day number 21 falling on a Monday Day-number patternFind every month where day 21 lands on Monday.
Additional facts
The core date facts below answer the most common follow-up questions for this day.
- It is day number 355 of the year, 10 days left.
- It is Monday number 51 out of 52 in 1998.
- It is Monday number 3 out of 4 in December 1998.
- Year 1998 has 365 days.
- December 1998 has 31 days.
December 21, 1998 is the 51st Monday of 1998, with 10 days remaining in the year after it.
About Monday
A quick weekday reference adds context beyond the exact date answer.
Monday is the 1st day of the week in ISO 8601. It comes after Sunday and before Tuesday.
In 1998, Monday appears 52 times, and December 21, 1998 is the 51st Monday of the year.
Use the Monday page to browse more dates that fall on the same weekday.
Read more about MondayAbout December
This month summary helps the date page carry more useful context on its own.
December is the 12th month of the Gregorian calendar and has 31 days in 1998.
In December 1998, the month began on Tuesday and ended on Thursday.
December sits in Q4, and this month contains 4 Mondays.
Read more about DecemberNearby dates
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