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
Gena (1)	JEE-nə	English
Dardana	dahr-DAHN-ah	Albanian
Evelyn	['i:vlin]
Detlev	DET-lef (Low German)	Low German, German
Konstantina	kon-stahn-DEE-nah	Greek
Itzel	-	Native American, Mayan