How to Say "My younger brother's birthday is also in September." in Korean?

"My younger brother's birthday is also in September." in Korean is 동생 생일도 구월이에요. (dongsaeng saengildo guworieyo)

케이크 만들어요. (keikeu mandeureoyo) - I make a cake.
케이크 만들고 있어요. (keikeu mandeulgo isseoyo) - I'm making a cake.
지금 뭐 만들고 있어요? (jigeum mwo mandeulgo isseoyo) - What are you making now?
딸기 (ttalgi) - Strawberry
딸기 케이크 (ttalgi keikeu) - Strawberry Cake
딸기 케이크 만들고 있어요. (ttalgi keikeu mandeulgo isseoyo) - I'm making a strawberry cake.
구월 (guwol) - September
엄마 생일 (eomma saengil) - Mom's Birthday