到時候

when the moment comes / at that time

to (a place) / until (a time) / up to / to go / to arrive / (verb complement denoting completion or result of an action)

to reach; to arrive / to leave for; to go to / to (a place); until (a time); up to (a point) / (verb complement indicating arriving at a place or reaching a point) / considerate; thoughtful; thorough

at that (future) time

o'clock / time / when / hour / season / period

time / length of time / moment / period

to wait / to inquire after / to watch / season / climate / (old) period of five days