十じゅう三さん夜や

noun

13th night of the lunar month; moon-viewing on the 13th night of the 9th lunar month

Refers to the 13th day of a lunar month, especially the traditional moon-viewing custom on the 13th night of the 9th lunar month (around October). Often paired with 十五夜 (the 15th-night moon-viewing).

• 今年ことしの十じゅう三さん夜やは曇くもりで月つきが見みえなかった。

  This year's 13th-night moon-viewing was cloudy and we couldn't see the moon.

• 十じゅう五ご夜やと十じゅう三さん夜やの両りょう方ほうで月つき見みをするのが縁えん起ぎがいいと言いわれる。

  It is said to be auspicious to do moon-viewing on both the 15th night and the 13th night.