- summertime (n.)
[summertime 词源字典]
- also summer-time, late 14c., somer tyme, from summer (n.1) + time (n.). Earlier were summertide (mid-13c.), sumeres tid (late Old English). In Britain, as two words, with reference to what in U.S. is daylight saving time, recorded from 1916.[summertime etymology, summertime origin, 英语词源]