On December 31, 2005 a “leap second” will be added to the world’s clocks at 23 hours, 59 minutes and 59 seconds Coordinated Universal Time (UTC). This corresponds to 6:59:59 pm Eastern Standard Time, ...

In the U.S., daylight saving time begins on the second Sunday in March at 2 a.m., when clocks "spring forward" one hour, and ...

It’s almost time to “fall back." As cooler weather settles in, the end of Daylight Saving Time is right around the corner — ...

Can you learn what happened to the clock at the entrance to the Naval Observatory on Massachusetts Avenue NW? It sat there in presumably broken condition for many weeks and then disappeared altogether ...

This month, the U.S. Naval Observatory’s Flagstaff Station will celebrate the 50th anniversary of its establishment as the USNO’s dark-sky observing site. This milestone will be marked by a public ...

The United States Naval Observatory is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing for the U.S. Navy and the U.S.

The U.S. Naval Observatory will hold a rare open house Saturday as part of a celebration of the International Year of Astronomy marking the 400th anniversary of Galileo's first examination of the ...

In the 2021 National Defense Authorization Act, Congress established a commission to rename several military bases and ships that commemorate members of the Confederacy. One of these is the Naval ...