予定だ【よていだ】

予定だ is used to express that something is planned or scheduled to happen. It conveys that a decision or arrangement has already been made, and the speaker is communicating that plan. It is similar to English "plan to ~" or "be scheduled to ~."

With verbs

Attach よてい予定だ to the plain (dictionary) form of a verb to express a planned action.

To express a plan not to do something, use the plain negative form of the verb before よてい予定だ.

With nouns

When using a noun, connect it with の before よてい予定だ.

Past form – 予定だった

Use よてい予定だった (casual) or よてい予定でした (polite) to describe what was planned, often implying the plan changed or didn't happen as expected.

予定だ vs. つもりだ

Both express plans, but よてい予定だ emphasizes a concrete schedule or arrangement, while つもりだ emphasizes the speaker's personal intention. For example, official schedules (flights, meetings, events) naturally pair with よてい予定だ, while personal resolutions pair better with つもりだ.