To say "make my day" means "do something that'll really please me".
說「make my day」的意思是「做點什麼事情讓我快樂一下」。
You are so wonderful; you always make my day.
你實在太好了,你時時令我愉快。
When my grandma surprised me with birthday cake, it really made my
day.
當我外婆用生日蛋糕帶給我驚喜時,我真的很開心。