What Day: March 31
Find the day of the week for any date of the year.
March 31 this year (2026) falls on a Tuesday. It's day 90 of the year, with 275 days left afterward, sits in Q1 (Spring), and falls under the zodiac sign Aries 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. March 31 will next fall on a Tuesday again in 2037. Within March, this is day 31 of 31, roughly 100% through the month. Overall, that's roughly 25% of the way through the year.
As of October 1, 2026, 12:18 PM (America/New York).
A Decade Ago
March 31, 2016 fell on a Thursday, 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 March 31 is September 28, which falls in fall and lands on a Monday this year.