三さん十じゅう

numeric

thirty; 30

Standard numeral for the quantity thirty.

• このクラスには三さん十じゅう人にんの学がく生せいがいます。

  There are thirty students in this class.

• 三さん十じゅうページまで読よんでください。

  Please read up to page thirty.

numeric

6am

Only when written ３０

Colloquial use of 30 to mean 6:00 a.m., from the 30th hour of a 24+ hour clock system sometimes used in late-night scheduling. Restricted to the Arabic numeral spelling ３０.

• 明日あしたの集しゅう合ごうは３０時じだって。つまり朝あさの６時じだよ。

  They said the meeting time tomorrow is 30 o'clock. That means 6 a.m.