How to say "timetable" in Japanese

• ダイヤCommon
  nounThe railway sense of 'timetable': the schedule of train services as a whole — how trains are timed to run — rather than a printed table of times. Typical context: a railway company revising its schedule.
  ダイヤが乱みだれていた。↗

  The timetable was disrupted.
• 時刻表じこくひょうJLPT N1approx.Common
  nounThe timetable as an actual table of times: departure and arrival times you look up when planning a journey. Typical context: checking train times at a station.
  時刻表じこくひょうが改正かいせいされた。↗

  The timetable has been revised.
• 時間割じかんわりJLPT N2approx.Common
  nounThe school sense of 'timetable': a weekly grid showing which subject falls in which period on each day. Typical context: a class timetable displayed in a classroom.
  私わたしたちは時間割じかんわりに従したがって勉強べんきょうする。↗

  We study according to the schedule.
• 定刻ていこくCommon
  nounReally the appointed or scheduled time itself — the time a train or flight is due — rather than a table of times, so it is seldom the word you want for 'timetable'.
  劇げきはちょうど定刻ていこくに始はじまった。↗

  The play began exactly on time.

For railways, 「ダイヤ」 is the schedule as a whole while 時刻表 is the table of times you consult; 時間割 is the weekly school timetable; 定刻 means the appointed time itself, not a timetable.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• ダイヤ(railway) schedule
• 時刻表じこくひょうtimetable
• 時間割じかんわりtimetable (esp. a weekly school timetable)
• 定刻ていこくappointed time
• タイムテーブルtimetable
• 時間表じかんひょうtimetable
• タイムスケジュールtime schedule
• タイムラインtimeline