Last Ten Days Of The Month
End Of The Month
noun
These are the below ten days of the month. In other words, the last ten days of the month, or even just the end of the month.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
四月の下旬に日本に戻って、六月上旬にまたアメリカに戻ってくる予定です。
I’m planning to go back to Japan at the end of April and come back to the states at the beginning of June.