Entering US Land border on CR1 on exact 2nd marriage anniversary.

Hello Everyone,

I am canadian citizen and planning to enter US on day of my 2nd marriage anniversary. I have CR1 mentioned on my stamped as I got immigrant visa before my 2nd anniversary. My question is will I be eligible to convert IR1 at landborder if I enter exact day after my 2 years of wedding, also I am planning to drive back to canada same aday once I get stamped. Let em know of anyone had to go through this situation and what was outcome?