What Day: December 13
Find the day of the week for any date of the year.
December 13 this year (2026) falls on a Sunday. It's day 347 of the year, with 18 days left afterward, sits in Q4 (Winter), and falls under the zodiac sign Sagittarius in Western astrology. Because of how leap years shift the calendar, a date's day-of-week doesn't repeat on a fixed yearly schedule. December 13 will next fall on a Sunday again in 2037. Within December, this is day 13 of 31, roughly 42% through the month. Overall, that's roughly 95% of the way through the year.
As of October 1, 2026, 12:19 PM (America/New York).
A Decade Ago
December 13, 2016 fell on a Tuesday, a useful reference point if you're comparing how a recurring event has shifted across the week over the years.
Half a Year Away
Roughly six months from December 13 is June 13, which falls in summer and lands on a Saturday this year.
Nearby Dates
Check the day of the week for the date just before or after December 13 using the links below.