Tonight’s the equinox! Yay! The timing of this is a bit funny. It’s actually March 20 at 05:14 UTC, so it’s 01:14 for eastern US folks, but actually on March 19 at 11:14 p.m. for us Mountain Timers ... Outside of astronomy, the equinox isn’t that big of a deal. There are lots of ways of looking at it, but perhaps the easiest is to say that it’s when the Sun rises due east and sets due west. It also means day and night are the same length, but that gets complicated ... One thing the equinox does not not NOT NOT mean is that you can balance ungainly objects on their ends on this day! [The trick] has nothing to do with the equinox .... it’s actually a simply matter of center of mass [and can be done any day of the year]

Bad Astronomy: Sweeping away equinox silliness