屆時

届时
jièshí
  1. when the time comes
  2. at the scheduled time

CEDICT

Entry Composition

1 屆 jiè
  1. to arrive at (place or time)
  2. period
  3. to become due
  4. classifier for events, meetings, elections, sporting fixtures, years (of graduation)
2 時 shí
  1. o'clock
  2. time
  3. when
  4. hour
  5. season
  6. period