午後の

of the afternoon

→ 午後
phrase Uncommon #15,615
of the afternoon の connects 午後 (afternoon) to the noun that follows, often meaning “afternoon” as a modifier.
JA: 午後の便に乗ります。
EN: I'll take the afternoon flight.

メアリーは午後の時間をクッキーを焼いて過ごした。

Mary spent the afternoon baking cookies.

午後の会議、出る?

Are you going to the afternoon meeting?

トムはいつもの午後の散歩に出かけたよ。

Tom went out for his usual afternoon walk.

午後の裁判官はダ・シルバではなくボレーネ

The judge this afternoon is Borene, not da Silva.

— 落下の解剖学 (2023)

午後の会合の出席者には、反応がなかった。

There was no response from the attendees of the afternoon meeting.

例によって、彼女は午後の会議に遅れて来た。

As usual, she arrived late for the afternoon meeting.

午後の便はありますか。

Is there an afternoon flight?

午後のサッカーはかなり暑くこの夏は瞬く間に過ぎ去った

The afternoon soccer was quite hot, and this summer flew by in the blink of an eye.

— ブエノスアイレス (1997)

“午後の予定は?”

What are your plans for this afternoon?

— 落下の解剖学 (2023)