also: ちょうせき · ちょうじゃく · ぢょうじゃく
Refers to the two times of day, often in contexts like daily routines or greetings.
It gets chilly in the morning and evening, so you'd better bring a jacket.
from morning till night; constantly
Used adverbially to mean 'all the time' or 'always'; often with a nuance of continuous effort or worry.
He devotes himself to his research from morning till night.
The mother worries about her child's health constantly.
It has become a habit to exchange morning and evening greetings with neighbors.
She thought of her late husband constantly, morning and night.
During this season, the temperature difference between morning and evening is large.
Alternate on-reading; very rare and mostly historical.
Obsolete kana spelling for ちょうじゃく; not used in modern Japanese.