When should I tell my date that I’m going abroad next year?

Context: I (21F) have been talking to this guy for 1 week (24M) and we have our first date this weekend.

He’s looking for a long-term relationship and so am I, but I’m also going abroad next year which complicates things if I do end up in a long-term relationship.

Anyway, I’m wondering when I should disclose the fact that I’m studying abroad next year for 4 months (starting in January). First date, or should I wait a few dates?

TLDR; I 21F have a date with a guy 24M who I’ve been talking to for a week now. When should I disclose the fact that I will be studying abroad for 4 months (starting in January)? First date or wait a few dates?