Other forms: daytimes
Daytime is the hours between sunrise and sunset. When the light is doing the work.
It is used as a noun and as a modifier, so daytime television, a daytime job and daytime opening hours are all standard. Broadcasting uses it as a category with a whole culture attached, since daytime television has a reputation of its own. Its opposite is night-time, which British English usually hyphenates. The word is one word and it never takes a plural.
1noundaytimeThe part of the day when it is light.
“The road is much busier in the daytime.”
From day + time.
Etymology from Wiktionary, CC BY-SA