struct returning 0 even though that value can never be there

So I have a struct called game date (for strategy game) and they have three values (D = Day, M = Month and Y = Year) and I have a script somewhere in the game to wait one day. What it will do is that it will take the current day and will do absolutely nothing for that day. But when I get to that part of the script, Debug.Log is telling me that value is 0 (as in days) but that is bullshit since that can never be assigned.