It would be more helpful if you posted the full context of whatever you want translated instead of just fragments. They're out of context so we have no idea about the situation those words were used in.

Hi Wilson, I'm not sure what the question is (if you could rephrase it, I'll try my best to answer) but here is the translation. 사랑이 피어나던 날에 --> [On] the day love blossoms 그 하루는 분주해져요 --> That day becomes busy