bedtime

Etymology

From Middle English bedtyme, bed-tyme, bedetyme, bedde tyme, equivalent to bed + time.

noun

1. The time or hour at which one retires to bed in order to sleep.
   I read every evening, sometimes late into the night, with the help of kerosene lamps, often secretly, past my bedtime. 2004, Vartan Gregorian, The Road to Home: My Life and Times, page 55
   Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits. Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found. 2013-07-19, Ian Sample, “Irregular bedtimes may affect children's brains”, in The Guardian Weekly, volume 189, number 6, page 34