ひるね昼寝hirune
1.

A short period of sleep taken during the day, often to recharge energy or alleviate tiredness.

2.

A restful break in the afternoon when one temporarily closes their eyes, typically lasting for a brief time.

3.

A practice commonly associated with warmer seasons, where individuals often sleep briefly in the daytime due to the heat and shorter nights.

Example:

私はよく日曜日に昼寝をしたものだった。