The Margin: When we do we change our clocks? Six things worth knowing about daylight-saving time.

Horizontal shot of happy girlfriend and boyfriend embrace with love, pose against pink studio wall. Bearded handsome man in white formal shirt hugs wife, stands behind. People and relationships

We spring forward one hour this weekend. The practice has been in place for more than a century in the U.S., but there’s talk of doing away with it.