What Day: September 23
Find the day of the week for any date of the year.
September 23 this year (2026) falls on a Wednesday. It's day 266 of the year, with 99 days left afterward, sits in Q3 (Fall), and falls under the zodiac sign Libra 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 23 will next fall on a Wednesday again in 2037. Within September, this is day 23 of 30, roughly 77% through the month. Overall, that's roughly 73% of the way through the year.
As of October 1, 2026, 12:19 PM (America/New York).
A Decade Ago
September 23, 2016 fell on a Friday, 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 23 is March 23, which falls in spring and lands on a Monday this year.
Nearby Dates
Check the day of the week for the date just before or after September 23 using the links below.