You can still see the outside sculpture garden for free of they are closed. It's worth a walk through.
In my opinion it's cost savings. They are open weekends for the rush and Monday's are there slow day. You see it a lot in Chinese restaurants.
The outdoors exhibits are outdoors. You should try it. Lots of fun.
Much like Garfield, they hate Mondays
No Clue
Thanks! Your answer is awaiting moderation.