(Cf. sele, n. 2). ? Observant of due season, punctual.

Involving or exercising careful judgement or observation; exact, precise; scrupulous; (sometimes) spec. very precise in timekeeping; punctual. Obs…

Esp. of a person: exactly observant of the time agreed or appropriate for a meeting, action, etc.; characterized by such observance. Of an action or…

More than punctual; arriving or waiting earlier than the appointed time.

Used attributively (usually in hyphenated form): not late; punctual, prompt.

= punctual, adj. 4e.