Moon Guide for May
Discover the phases of the Moon in May 2025, including a close approach with Mars and the Micro Flower Moon.
Elsewhere on timeanddate.com
In 1875, 17 Countries Signed the Metre Convention
A quick guide to the meter—the standard unit of length—with 4 examples of where the meter is part of day-to-day life in the USA (instead of inches, yards, and miles).
Update on T Coronae Borealis Eruption
“The explosion could occur in the coming months or next year. In this situation, patience is key!” says astrophysicist Léa Planquart.
Eta Aquarids Meteor Shower 2025
The Eta Aquarids will bring up to 50 shooting stars per hour in early May. Here’s how to spot them.