Daytime; the period during which daylight lasts; the hours of day.
From Old English 'dæg' (day) and 'tīd' (time, season). 'Tide' originally meant any period of time, not just ocean tides, and appears in words like 'Christmastide' and 'Eastertide'.
The word 'tide' didn't start meaning ocean waves—it meant 'time,' which is why Christmas is Christmastide and we still say 'the tide of history'—daytide is literally just 'day-time'!
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