The autumnal equinox this year is at 7:03 p.m. Sept. 22. We typically think of the first day of fall as something that happens all day long, but the equinox is the time when the sun crosses the ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Did you know that it’s not always the case ...

Although it may not feel like it, this year’s trip around the sun will include an extra day. In 2024, February gets 29 days instead of 28. Yep, it’s a leap year, also termed a “sidereal” year, which ...

Most people were taught some variation of the classic rhyme: "Thirty days hath September,April, June and November,All the rest have thirty-one,Save February at twenty-eight." But there are two other ...

One of the great joys and headaches of writing about science for a Washington, D.C., audience is that there are a lot of brilliant people reading: engineers at NASA, doctors for the National ...

It's not every year that you see February 29 on the calendar -- and it's not technically every four years either. Thursday is officially leap day. For some, its birthdate, or a day for special deals ...

I decided a while ago to make this post an annual BA tradition on Jan. 1, which is a more polite way of saying it’s a repost and I’m sometimes a tad on the lazy side. I’ve punched it up here and there ...

Happy February 29! It doesn’t come round very often, so make sure you enjoy it. But why do we have these extra days? Well, if we didn’t, the seasons would gradually move around the calendar. Rather ...