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Sep 14th, 1936
1st Appearance of Dr. Occult in costume (Superman prototype) 1st Appearance of the Seven 1st Appearance of Zator
Nov 28th, 1939
The Spectre Cameo in an Advertisement Final Appearance of Dennis Stone Final Appearance of the Flying Fox
Dec 28th, 1939
1st Appearance/Origin of The Spectre (Jim Corrigan) 1st Appearance of The Voice 1st Appearance of Clarice Winston 1st Appearance of Gat Benson Final Appearance of Wing Brady
Mar 29th, 1940
1st Appearance of Dr. Fate 1st Appearance of Zor 1st Appearance of Wotan 1st Appearance of Inza Cramer 4th Appearance of the Spectre
Mar 26th, 1941
Origin of Dr. Fate Last Issue for Congo Bill 1st Appearance of Nabu the Wise 1st Appearance of Negal, Ruler of Charn
Jun 25th, 1941
First time in a DC comic that two villains team-up (Wotan and Ian Karkull) Final Lance Larkin Appearance
Jul 23rd, 1941
1st Appearance/Origin of Johnny Quick 1st Appearance of Tubby Watts 1st Appearance of Professor Gill
Aug 19th, 1941
2nd Appearance of Johnny Quick Debut of Dr. Fate new Helmet Last Appearance of Captain Desmo
Sep 19th, 1941
1st Appearance/Origin Aquaman 1st Appearance of Green Arrow 1st Appearance of Speedy 1st Appearance of Mr. Who
Oct 20th, 1941
2nd Appearance of Aquaman 2nd Appearance of Green Arrow 2nd Appearance of Speedy 1st Appearance of Captain Black Jack 1st Appearance of Dr. Clever 1st Appearance of Percival Popp
Sep 15th, 1942
First instance of the Golden Age Aquaman's weakness to being outside water too long. Unlike the Silver Age, there's no set time limit. (Courtesy of Fandom)
Nov 18th, 1944
1st Appearance/Origin Superboy 1st Appearance of Earth-One 1st Appearance of Jonathan Kent (Earth-One) 1st Appearance of Martha Kent (Earth-One) 1st Appearance of Jor-El II (Earth-One) Last solo Golden Age Appearance of the Spectre
Nov 20th, 1945
Last Superboy in title Last Johnny Quick in title Last Aquaman in title Last Green Arrow and Speedy in title