At the expected or proper time.

synonym: on time.

Roget 132a: on time, punctually, at the deadline, precisely, exactly; right on time, to the minute; in time; in good time, in military time, in pudding time^†, in due time; time enough; with no time to spare, by a hair's breadth.    ... show more

Roget 138: periodically etc. adj.; at regular intervals, at stated times; at fixed established, at established periods; punctually etc. adj.. de die in diem [Lat.]; from day to day, day by day.    by turns; in turn, in rotation; alternately, every other day, off and on, ride and tie, round and round.    ... show more