ひづけ
The easiest table in the course, and the hardest

Number + がつ, no sound changes — except 4, 7 and 9 taking し, しち, く again.
4月 = しがつ
The first ten are the ひとつ・ふたつ series in disguise. 14, 20 and 24 stay odd too.
20日 = はつか
から starts it, まで stops it — in time or in space, and either can stand alone.
くじから ごじまで

ついたち、ふつか、 みっか…?

You've met these before — they're ひとつ, ふたつ, みっつ with new endings.
〜がつ
Number plus がつ. No softening, no exceptions — apart from 4, 7 and 9, which take し, しち and く for the third and final time. This is the same trio you met in Unit 57 and again on the clock, and it is the last place they appear. 🔊 Tap any row.
〜にち
Worth saying plainly: this is the hardest table on the site. The first ten days don't use the number-plus-ending pattern at all — but you have met them before. They are the ひとつ・ふたつ・みっつ series from Unit 58, with か where つ used to be.
Thirteen forms: ついたち through とおか, plus じゅうよっか・はつか・にじゅうよっか. Every other day of every month is the number plus にち. Learn the thirteen and the rest costs nothing — and nine of the thirteen are already half-familiar from the counters.
ひづけを いう
Month first, then day — bigger unit before smaller, the same order Japanese uses for clock times and addresses. A full date takes に, because it names a point you could put a finger on.
Big unit first, small unit second — month then day, the opposite of British English and the same as the way Japanese writes addresses and clock times. A full date takes に, like any other named point in time.
And the pair that turns single points into a stretch of time. You met から in Unit 31 meaning “because” — this is the same word doing its original job, marking where something begins.
から marks where something starts and まで where it stops — in time or in space, and either one can stand on its own. You already know から as “because” from Unit 31; this is the same word doing its original job, marking a starting point.
かいわ
Four exchanges using every piece of Phase R — the clock, the days and now the calendar.

きょうは なんがつ なんにち ですか。
What's the date today?

しがつ ふつか です。
It's the 2nd of April.

しけんは いつ ですか。
When is the exam?

しちがつ とおか に あります。
It's on the 10th of July.

なんじ から なんじ まで はたらきますか。
What hours do you work?

ごぜん くじ から ごご ろくじ まで です。
From 9 a.m. to 6 p.m.

なつやすみは いつから ですか。
When do the summer holidays start?

しちがつ はつか から です。
From the 20th of July.
クイズ
Twelve questions. Every wrong choice is the form you'd build by rule — which is exactly the trap, because these thirteen refuse the rule.
Question 1 / 12 · 0 correct