by day

and by night

during the day; during the night. (Often used in simultaneous clauses for contrast.) By day, Mary worked in an office; by night, she took classes. Dave slept by day and worked by night.

Common Names:

Name	Pronounced	Usage
Leonard	LEN-ərd (English), LAY-o-nahrt (Dutch)	English, Dutch, German, Ancient Germanic
Abbot	['æbət]
Travis	TRA-vis	English
Henrikas	-	Lithuanian
Darlene	dahr-LEEN	English
Jolana	-	Czech, Slovak