Lunar Eclipse or Lunacy?

The word "lunacy" comes from "luna", a Latin root that refers to the moon.  A thirteenth century definition of "lunacy" reads:   periodic insanity, dependent on the changes of the moon.

This may look like periodic insanity, dependent on changes in the moon.  But let me assure you, these are  perfectly sane people, even if they did spend a while outside in the twenty degee darkness between 1 and 2 a.m. this morning.

Lunar eclipses happen at least twice each year, although the last total lunar eclipse was in 2008.

Things that look like lunacy can happen any time.