Bedtime (noun)

1. The time at which someone goes to bed.
2. The time period before bed when someone gets ready for sleep.

Origin:

Late 19th century: from bed + time.

Examples:

1. It's getting late, time for bedtime.
2. The children were tired, so we set a bedtime of 8:30pm.
3. He had a bedtime routine of reading a book before sleeping.
4. She was always in bed by bedtime, she needed her sleep.
5. Bedtime was the best time for him to reflect on his day.