You’ve heard of Daylight Saving Time, Standard Time, Eastern, Central, Mountain, and Pacific Time, but have you heard of the term Greenwich Mean Time, sometimes referred to simply as GMT, or Coordinated Universal Time (UTC), and wondered what the heck it is? In essence, “mean time” is what you would read off of a clock.

When do we fall back and spring forward? We have the dates and history of the time change. Is it a practice whose time has come?