- up-to-date (adv.)
[up-to-date 词源字典]
- 1840, "right to the present time," from phrase up to date, probably originally from bookkeeping. As an adjective from 1865. Meaning "having the latest facts" is recorded from 1889; that of "having current styles and tastes" is from 1891.[up-to-date etymology, up-to-date origin, 英语词源]