Can I use the expression "the night's young" in a daily conversation? Or is it used poetically because it is a song?
Yes, you can use "the night's young" in daily conversation. You can say "the night's young" when you are with someone or a group of people, in the evening or at night, and you want to say that there are still many activities you can do together that night. This phrase is typically used when going out partying with friends. Ex: A: Do you want to go to another club? B: Of course, the night's young! Ex: A: Do you think we will have time to do everything we have planned for tonight? B: Sure, the night's young!