Antonyms of adj after-hours

1 sense of after-hours

Sense 1
after-hours -- (after closing time especially a legally established closing time; "after-hours socializing"; "an after-hours club")

INDIRECT (VIA middle, late) -> early -- (at or near the beginning of a period of time or course of events or before the usual or expected time; "early morning"; "an early warning"; "early diagnosis"; "an early death"; "took early retirement"; "an early spring"; "early varieties of peas and tomatoes mature before most standard varieties")
INDIRECT (VIA late, early) -> middle -- (between an earlier and a later period of time; "in the middle years"; "in his middle thirties")

Similarity of adj after-hours

1 sense of after-hours

Sense 1
after-hours -- (after closing time especially a legally established closing time; "after-hours socializing"; "an after-hours club")
       => late (vs. early) (vs. middle) -- (being or occurring at an advanced period of time or after a usual or expected time; "late evening"; "late 18th century"; "a late movie"; "took a late flight"; "had a late breakfast")

Synonyms of adv after-hours

1 sense of after hours

Sense 1
after hours -- (not during regular hours; "he often worked after hours")