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.

Can a 21 year old date a 17 year old in Canada?

You can be charged with a sexual offence for sexual activity with a minor under 16 years of age. There is nothing that prohibits someone in Canada from “dating” a minor, sixteen years of age and younger, so long as the date does not involve sexual activity.