Is it illegal for a 21-year-old to date a 17-year-old? Absolutely. There is no law that prohibits you from going out with someone (like going to the cinema, to the park, etc.). But if youre really asking whether its legal for a 17-year-old to have sex with a 21-year-old, the answer is, it depends.

Is it weird to be 20 and date a 17 year old?

No. You can talk, date and even have sex, provided that its consensual. A 16 or 17 y/o can, legally / lawfully, consent to sexual relations with someone who is 23 or