Mary Baker's May 1917 Calendar with Season Wishes from Out of the Briny Deep!

This is the most curious and amusing of several crayon drawings done by Mary Baker I'm listing, surely done when she was in grade school, and here I think getting some help with the numbering of the calendar. I couldn't love more this idea of sending spring greetings from "the briny deep"--except I think her creature drawings top even that!  Quite a thing!

8 1/4" x 5 15/16" and in pretty good shape, with a little creasing near the bottom and tear and folded corner at lower right.