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
Osanne	-	French (Rare)
Judocus	-	Dutch (Archaic), Ancient Celtic (Latinized)
Amabel	['æməbel]
Ransom	['rænsəm]
Leutgard	-	Ancient Germanic
Trahaearn	-	Welsh