strictly observant of an appointed or regular time; not late; prompt.

made, occurring, etc., at the scheduled or proper time

punctual payment.

pertaining to or of the nature of a point.

punctilious.

adjective

late , tardy

adjective

accurate , careful , conscientious , conscionable , constant , cyclic , dependable , early , exact , expeditious , fussy , heedful , in good time , meticulous , on schedule , on the button , on the dot , on the nose * , painstaking , particular , periodic , precise , prompt , punctilious , quick , ready , recurrent , regular , reliable , scrupulous , seasonable , steady , strict , timely , under the wire * , on time