December 1, 2012
That's a "Calvin & Hobbes" strip from 9/11/92, pointed out by a student in my "Religion & the Constitution" class.
Here's a great tool for finding vaguely remembered "Calvin & Hobbes" strips (if you have a key word). Here are a couple other separation-of-religion-and-education strips, focusing on the Pledge of Allegiance.
Gift idea: "The Complete Calvin and Hobbes." (Generic gift-buying portal for making no-cost-to-you contributions to the Althouse blog: here.)
And thanks to Rusty, commenting in "What sort of man walks the streets of Madison with a camera strapped to his head?": "Meade looks like Hobbes. In Calvin and Hobbes."