What Day: May 21
Find the day of the week for any date of the year.
May 21 this year (2026) falls on a Thursday. It's day 141 of the year, with 224 days left afterward, sits in Q2 (Spring), and falls under the zodiac sign Gemini 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. May 21 will next fall on a Thursday again in 2037. Within May, this is day 21 of 31, roughly 68% through the month. Overall, that's roughly 39% of the way through the year.
As of October 1, 2026, 12:19 PM (America/New York).
A Decade Ago
May 21, 2016 fell on a Saturday, 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 May 21 is November 21, which falls in fall and lands on a Saturday this year.