I found this adorable calendar at JoAnn Fabric and Crafts last week. I'm sure it's available all over. (From Day Dream Brand.)
My favorite illustration is this Mary Blair one:
But they're all cute!
The last one, below isn't from the calendar - it's from the It's A Small World sheet music, circa 1963:
Gee - can you tell I have been dreaming of going to Disneyland?