What Day: September 13
Find the day of the week for any date of the year.
September 13 this year (2026) falls on a Sunday. It's day 256 of the year, with 109 days left afterward, sits in Q3 (Fall), and falls under the zodiac sign Virgo 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. September 13 will next fall on a Sunday again in 2037. Within September, this is day 13 of 30, roughly 43% through the month. Overall, that's roughly 70% of the way through the year.
As of October 1, 2026, 12:19 PM (America/New York).
A Decade Ago
September 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 September 13 is March 13, which falls in spring and lands on a Friday this year.
Nearby Dates
Check the day of the week for the date just before or after September 13 using the links below.