Last Ten Days Of The Month
End Of The Month
noun
げじゅん
月末 (げつまつ) End Of The Month, Month End
下旬 (げじゅん) Last Ten Days Of The Month, End Of The Month
上旬 (じょうじゅん) First Ten Days Of The Month, Beginning Of The Month
中旬 (ちゅうじゅん) Middle Ten Days Of The Month, Middle Of The Month
The bottom 下 third of the time within a month 旬 has the Last Ten Days Of The Month 下旬