Six Flags questions

[MVBowers111]

We are looking into a Christmas trip this year and my kids really want to go to MM, I know nothing about MM. So, we will be in So. California arriving on Dec. 21 and leaving on the 26th. Does MM get as crowded as Disneyland over Christmas? I see that it's closed on the actual holiday, but what day would be the best to go to this park? Or, would Knotts be a better option? Although we've been there a couple times already.

Any help would be greatly appreciated!

 

[StageTek]

MM gets very crowded that time of year. Not as crowded as Disneyland
but very crowded. Every day from the 21st until you leave will be quite
crowded - no one day better than any other. Maybe the 24th?