Courier from Colgate

Okay so I had applied for RD round. And found out that they mail the decisions and not announce them on portal or so. Can anyone please tell me the regular decision notification date? Moreover, I just got a letter from Colgate stating thank you for your interest in the university and we’d like to welcome you to visit. Is everyone provided with that letter or does it mean anything?

Decisions get mailed March 20. I think everyone gets that visit mailing.