Today in Comics History, June 21, First Day of Summer: Superman orders you to break chains or you lose at summer

"Super Strength: Rules for Summer Living" from Superman (1940 series) #5 (DC/Superman Inc., Summer 1940), script by Jerry Siegel, Superman= inset by Joe Shuster, pencils and inks by Dennis Neville (?)

Today in Comics History, June 21, First Day of Summer: Here's your big summer annual crossover.

from Ambush Bug Nothing Special #1 one-shot (DC, September 1992), plot and pencils by Keith Giffen, script by Robert Loren Fleming, inks by Al Gordon, colors by Anthony Tollin, letters by John Costanza

Today in Comics History, June 21, First Day of Summer: Homer is not ready to go camping

from "The Winter of Our Discount Tent" in The Simpsons Winter Wingding #10 (Bongo, November 2015), script by Ian Boothby, pencils by Phil Ortiz, inks by Mike DeCarlo, colors by Alan Hellard, letters by Karen Bates

Today in Comics History, June 21, First Day of Summer: Now that it's officially summer, here's some fun activities, from a pig

"Peter Porkchops Gives Tips on Summer Fun!" from DC Comics cover-dated August 1954, script by Jack Schiff, pencils and inks by Rube Grossman, letters by Ira Schnapp

Today in Comics History, June 21, First Day of Summer: Batman's got 104 days of summer vacation

from Detective Comics #735 (DC, August 1999), script by Greg Rucka, pencils by Dan Jurgens, inks by Bill Sienkiewicz, colors by Noelle Giddings, color separations by Wildstorm, letters by John Costanza