January
- 3: Birthday of Jim Corrigan (the golden age Spectre)
- 5: Birthday of Police Commissioner James W. Gordon of Gotham City
- 7: Birthday of Sandra Knight (golden age Phantom Lady)
- 8: Birthday of Queen Hippolyte of Paradise Island
[1976 Super DC Calendar; placed on May 18 in Wonder Woman #131 (1962) -- both Pre-Crisis]
10: Birthday of Snapper Carr, formerly with the JLA
11: Birthday of Andrew Nolan (Ferro Lad)
12: Birthday of Brin Londo (Timber Wolf)
13: Birthday of Grodd, the super-gorilla
16: Birthday of Wally West (Kid Flash / Flash III)
" : Birthday of Lena Thorul (nee Lena Luthor) [Action Comics #297 (1963); placed on December 16 in 1976 Super DC Calendar]
17: Birthday of Kent Nelson (golden age Doctor Fate)
18: Birthday of Roy Lincoln (The Human Bomb)
21: Birthday of Pete Ross, Superboy's pal
22: Birthday of Roscoe Dillon (The Top)
23: Birthday of Captain William Storm of The Losers
25: Birthday of Dr. Thaddeus Bodog Sivana, world's wickedest scientist
27: Birthday of Al Pratt (golden age Atom)
28: Birthday of Gim Allon (Colossal Boy)
29: Birthday of Arthur Curry (Aquaman)
31: Birthday of Mera, Aquaman's wife
February
- 5: Birthday of Tasmia Mallor (Shadow Lass)
- 6: Birthday of Sue Dearborn Dibny, Elongated Man's wife
- 8: Birthday of Tenzil Kem (Matter-Eater Lad)
- 9: Birthday of Rex Mason (Metamorpho)
- 10: Birthday of Greg Sanders (golden age Vigilante)
- 11: Birthday of Rokk Krinn (Cosmic Boy)
- 14: Hawkman & Hawkgirl's (Katar & Shayera's) wedding anniversary
- 18: Birthday of Eobard Thawne, Prof. Zoom (The Reverse Flash)
- 19: Birthday of Bruce Wayne (The Batman)
[Earth-1 version; April 7 for Earth-2 Bruce Wayne]
20: Birthday of Hal Jordan (Green Lantern II)
21: Birthday of Jo Nah (Ultra Boy)
24: Birthday of Dirk Morgna (Sun Boy)
25: Birthday of Toby Manning (Terra Man)
26: Birthday of "Gunner" MacKay of the Losers
" : February 26: Birthday of Helix (Baby Boom, Kritter, Mr. Bones, Penny Dreadful, Tao Jones, Arak Wind-Walker)
27: Birthday of Lori Lemaris, mermaid of Atlantis
29: Birthday of Kal-El (Superman); Captain Marvel chose February 29 for his birthday, too!
March
- 5: Birthday of Pat Dugan (Stripesy), Star-Spangled Kid's partner
- 6: Birthday of Garth (Aqualad / Tempest), Aquaman's partner
- 8: Birthday of Zatara, the magician Zatanna's dad
- 10: Clark Kent's first meeting with Bruce Wayne
- 11: Birthday of Lee Travis (golden age Crimson Avenger)
- 12: Birthday of Perry White, editor of the Daily Planet
- 13: Birthday of Mick Rory (Heat Wave)
- 14: Birthday of Selina Kyle (The Catwoman)
- 19: Birthday of Barry Allen (The Flash II)
[Pre-Crisis version; May 13 for Post-Crisis Barry Allen]
20: Birthday of Dick Grayson(Robin / Nightwing II) [Post-Zero Hour version; November 11 for Pre-Crisis Dick Grayson; a week before Halloween in October for post-Crisis Dick Grayson]
21: Ralph Dibny (Elongated Man) [Post-Crisis version; May 26 for Pre-Crisis Ralph Dibny]
22: Birthday of Princess Diana of Paradise Island (Wonder Woman), molded from clay and brought to life
23: Birthday of James Jesse (Trickster)
24: Superboy's first meeting with Lex Luthor. They were friends -- then!
25: Birthday of Lydda Jath (Night Girl) of the Legion of Substitute Heroes
27: Birthday of Lar Gand (Mon-El)
28: Birthday of Lanfor "Happy" Terrill (the golden age Ray; real first name revealed in Freedom Fighters series)
30: Birthday of Katar Hol (Hawkman II)
31: Birthday of Arthur Curry, Jr. (Aquababy), Aquaman's son
April
- 1: Birthday of Mr. Mxyzptlk
" :
Birthday of Billy & Mary Batson (Captain Marvel & Mary Marvel) [Shazam! #4 (1973); placed on December 23 in 1976 Super DC Calendar]
" : Johnny Chambers & Libby Lawrence's wedding anniversary (1942)
3: Birthday of Jay Garrick (golden age Flash)
4: Birthday of Darrell Dane (Doll Man)
5: Birthday of Chuck Taine (Bouncing Boy)
6: Brainiac created by computers of planet Colu.
7: Birthday of Bruce Wayne (golden age Batman) [Earth-2 version; February 19 for Earth-1 Bruce Wayne]
8: Birthday of Alfred Pennyworth, Bruce Wayne's butler
9: Birthday of John Sargent (Sargon the Sorcerer)
10: Birthday of Dinah Drake Lance (golden age Black Canary)
11: "Birthday" of Linda Danvers (Supergirl). Anniversary of her arrival on Earth [1976 Super DC Calendar; placed on May 18 in Action Comics #305 (1963)]
19: Birthday of Samuel Scudder (Mirror Master)
20: Superboy's first meeting with Mon-El
21: Birthday of Tinya Wazzo (Phantom Girl)
24: J'onn J'onzz, Martian Manhunter, stranded on Earth
26: Birthday of Donna Troy (Wonder Girl)
28: Birthday of Uncle Dudley (Uncle Marvel)
29: Pete Ross learns Clark Kent is Superboy.
May
- 2: Lena Thorul (Luthor's sister) marries Jeff Colby
- 3: Birthday of Maxwell Jensen (The Parasite)
- 4:
Birthday of Pieter Anton Cross (Dr. Mid-Nite II) in Trondheim, Norway (1962 Post-Zero Hour)
5: Birthday of Condo Arlik (Chemical King)
6: Adam Strange’s first trip to the planet Rann
7: Birthday of Freddy Freeman (Captain Marvel, Jr.)
8: Birthday of Jack Ryder (The Creeper)
10: Captain Marvel captures Mr. Mind
11: District Attorney Harvey Kent scarred by acid (see June 12)
12: Luthor’s first attempt to kill Superboy
13: Birthday of Barry Allen (The Flash II) [Post-Crisis version; March 19 for Pre-Crisis Barry Allen]
14: Superboy becomes Superman
16: Lana Lang given bio-ring by alien, she becomes Insect Queen
18: Birthday of Dr. Charles McNider (golden age Dr. Mid-Nite)
" : Birthday of Queen Hippolyta of Paradise Island [Wonder Woman #131 (1962); placed on January 8 in 1976 Super DC Calendar -- both Pre-Crisis]
" : "Birthday" of Linda Danvers (Supergirl). Anniversary of her arrival on Earth (at 12:17 PM EST) [Action Comics #305 (1963) & Supergirl #20 (1984); placed on April 11 in 1976 Super DC Calendar]
19: Birthday of George "Digger" Harkness (Captain Boomerang)
20: Birthday of Zatanna the magician
21: Birthday of Beautia Sivana, Dr. Sivana's good daughter
25: Birthday of the real Diana Prince (Mrs. Dan White)
" : Birthday of Jason Burr and Kobra in New Delhi (1953 Pre-Crisis)
26: Birthday of Ralph Dibny (Elongated Man) [Pre-Crisis version; March 21st for post-Crisis Ralph Dibny]
28: Superboy's first meeting with Mxyzptlk
June
- 1: Birthday of Carter Hall (golden age Hawkman)
- 3: Birthday of Salu Digby (Shrinking Violet)
- 4: Birthday of Mark Mardon (Weather Wizard)
- 6: James W. Gordon graduates from law school
- 8: Murder of Thomas and Martha Wayne (Batman's parents)
[1976 Super DC Calendar; placed on June 26 in Batman Special #1 (1984) -- both Pre-Crisis]
9: Birthday of Capt. Johnny Cloud of The Losers
11: SUPERMAN DAY. Anniversary of his debut as Superboy
12: Harvey Dent becomes Two-Face
16: Krypton blows up
18: "Birthday" of Clark Kent. Anniversary of the day he landed on Earth [Pre-Crisis version; Post-Crisis Clark Kent's "birthday" is in November]
19: Birthday of Shayera Thal (Hawkgirl II / Hawkwoman)
22: Birthday of Hartley Rathaway, alias Thomas Peterson and Henry Darrow (Pied Piper)
23: Superman’s first battle with Terra-Man
24: Accident in Luthor’s lab gives his sister Lena ESP powers
25: The Kents adopt Superbaby, name him Clark.
26: Murder of Thomas and Martha Wayne (Batman's parents) [Batman Special #1 (1984); placed on June 8 in 1976 Super DC Calendar -- both Pre-Crisis]
27: Aquaman marries Mera
" : Murder of John & Mary Grayson (Robin's parents) [Post-Zero Hour version; July 15 in Pre-Crisis version; Halloween in Post-Crisis version]
28: Wing (Crimson Avenger's partner) dies to save Earth
" : JSA and allies are bathed in Ian Karkull's chronal radiation, prolonging their lives and keep them vital for many years (1941)
29: Krypto lands on Earth
30: Perry White hires Clark Kent
July
- 2: Birthday of Tawky Tawny (Mr. Tawny), the talking tiger
- 4: Uncle Sam's Birthday (U.S. Independence Day)
- 5: Birthday of Steve Lombard, WGBS sportscaster
- 6: Mary Batson becomes Mary Marvel
- 7: Birthday of the JSA's Johnny Thunder
- 8: Ma and Pa Kent made younger by elixir from another dimension
- 9: Birthday of Ray Palmer (The Atom II)
- 10: Birthday of Drake Burroughs (Wildfire)
- 11: Escaping from Batman, Red Hood swims through chemical wastes. They dye his skin and hair -- he becomes the Joker
- 13: Supergirl meets Comet, the Super-Horse
- 15: Murder of John & Mary Grayson (Robin's parents)
[Pre-Crisis version; Halloween in Post-Crisis version; June 27 in Post-Zero Hour version]
16: First meeting of the Justice Society of America (1940) [Pre-Crisis version; November 22 for Post-Crisis version]
17: Birthday of Lana Lang, Superboy's girlfriend
19: Ted Grant, suspected of murder, becomes Wildcat to clear himself
20: Birthday of Al Desmond (formerly Mr. Element and Dr. Alchemy)
" : Birthdays of Jennie-Lynn Hayden (Jade) and Todd Rice (Obsidian)
21: Birthday of Staq Mavlen (Fire Lad) of Legion of Substitute Heroes
22: Justice League of America organized
23: Jim Corrigan murdered -- he becomes the Spectre
25: Birthday of Lucy Lane, Lois's sister
26: Birthday of Oswald Chesterfield Cobblepot (The Penguin)
27: Luthor creates first adult Bizarro
28: Batman's first clash with the Catwoman
29: Ray Palmer first uses his dwarf star power to become the Atom
31: Birthday of Sgt. Frank Rock of Easy Company (1917)
August
- 1: Birthday of The Joker (real name unknown)
- 2: Dr. Charles McNider blinded by killer’s grenade (see December 1)
- 3: Superman made world citizen by the U.N.
- 5: Superboy discovers Kryptonite
- 6: Birthday of Kid Eternity (real name unknown)
[Pre-Crisis name later revealed as Christopher "Kit" Freeman, brother of Freddy Freeman]
7: Birthday of Morgan Edge, President of Galaxy Communications
9: Ma & Pa Kent die of fever plague
10: Boston Brand murdered, becomes Deadman
11: Linda Lee adopted by Fred & Edna Danvers
13: Steve Trevor’s plane crashes on Friday the 13th
14: Supergirl adopts Streaky, the Super-Cat
15: Birthday of Ral Benem (Chorophyll Kid) of the Legion of Substitute Heroes
16: Birthday of Prof. Ira West, the Flash's father-in-law
17: Birthday of Lois Lane
18: Birthday of Wing How (Wing), Crimson Avenger's partner (full name revealed in Crimson Avenger mini-series)
20: Birthday of Jan Arrah (Element Lad)
21: Birthday of Shiera Sanders (golden age Hawkgirl)
23: Freddy Freeman becomes Captain Marvel, Jr.
" : Kid Eternity dies before his time, gets powers
25: Dick Grayson's first appearance as Robin [Pre-Crisis version]
27: Lab accident destroys Luthor's great discovery, makes him lose his hair. He blames Superboy, starts feud
28: Ralph Dibny marries Sue Dearborn, publicly reveals he is Elongated Man
29: Birthday of "Eel" O'Brian (Plastic Man)
30: Superman builds his Fortress of Solitude
31: J'onn J'onzz, Martian Manhunter, quits JLA and leaves Earth to join his exiled people
September
- 1: Birthday of Jonathan Kent, Superboy's foster father
- 3: Superboy’s last day in Smallville
- 4: Wonder Woman comes to "Man's World"
- 7:
Birthday of Helena Wayne (The Huntress) [Pre-Crisis version]
8: Superman rescues bottle-city of Kandor from Brainiac
9: Blackhawk’s brother and sister killed by Nazi ace. Blackhawk vows vengeance
10: Birthday of Reep Daggle (Chameleon Boy)
11: Birthday of Roy Raymond, TV Detective
12: Birthday of Ted Grant (golden age Wildcat)
13: Birthday of Thaddeus Bodog Sivana, Jr., world's wickedest boy
14: Wedding anniversary of Adam Strange and Alanna
15: Linda Danvers meets Lena Thorul (Luthor's sister)
18: Birthday of Val Armorr (Karate Kid)
20: Clark Kent meets Lori Lemaris
22: Birthday of Kara Zor-El (Supergirl)
23: Birthday of Barbara Gordon (Batgirl II)
26: Birthday of Sandy Hawkins (golden age Sandman's partner)
27: Birthday of Iris Allen, the Flash's wife
28: Birthday of Lex Luthor
29: Red Tornado created by T.O. Morrow
30: Supergirl's public debut
October
- 1: Clark Kent meets Pete Ross
- 2: Birthday of Alan Scott (golden age Green Lantern)
- 3: Supergirl frees her parents from Survival Zone
- 5: Birthday of Luornu Durgo (Duo Damsel)
- 6: Larry Lance dies. His wife, Black Canary, comes to Earth-1
- 7: Prof. Dalton creates first Bizarro Superboy
- 8: First Bizarro destroyed
- 12:
Birthday of Albert Julian Rothstein (Nuklon / Atom-Smasher)
13: Batman & Robin's first clash with the Joker
14: Birthday of Sterling Morris, owner of station WHIZ
17: Birthday of John Stewart (Green Lantern III)
19: Birthday of Magnificus Sivana, Dr. Sivana's good son
20: Birthday of Terry Sloane (golden age Mr. Terrific)
21: Jonathan & Martha Kent's wedding anniversary
22: Birthday of Thom Kallor (Star Boy)
23: Freak accident gives Barry Allen super-speed. He becomes the Flash
26: Birthday of Lola Barnett, WGBS gossip reporter
28: Birthday of Blackhawk (real name unknown) [name revealed as Janos Prohaska post-Crisis]
30: Birthday of Dexter Miles, curator of the Flash Museum
31: Birthday of Daphne Pennyworth (Alfred's niece)
November
- 1: Birthday of Roy Harper (Speedy / Arsenal)
- 3: Birthday of Wesley Dodds (golden age Sandman)
- 5: Birthday of Rex Tyler (golden age Hourman)
- 6: Birthday of Boston Brand (Deadman)
- 7: Birthday of Martha Clark Kent, Superboy's foster mother
- 8: Billy Batson first becomes Captain Marvel
- 9:
Justice Society of America is formed (1940) [Post-Crisis version; early July for Pre-Crisis version]
10: Birthday of Garth and Ayla Ranzz (Lightning Lad & Lightning Lass / Light Lass)
11: Birthday of Dick Grayson (Robin / Nightwing) [Pre-Crisis version; a week before Halloween in October for Post-Crisis Dick Grayson; first day of Spring or March 20 for Post-Zero Hour Dick Grayson]
14: Birthday of Hector Sanders Hall (Silver Scarab / Sandman III / Dr. Fate IV)
15: Birthday of Richard Grey, Jr. (golden age Black Condor)
16: Birthday of Jonathan Crane (The Scarecrow)
17: Atomic wastes turn Maxwell Jensen into the Parasite
19: Birthday of Lyle Norg (original Invisible Kid)
20: Greg Sanders' father killed by bandits
21: Birthday of Kamandi, last boy on Earth
22: Birthday of Abra Kadabra
" : First meeting of the Justice Society of America (1940) [Post-Crisis version; July 16 for Pre-Crisis version]
23: Birthday of Imra Ardeen (Saturn Girl)
24: Barry & Iris Allen's wedding anniversary
26: Birthday of "Sarge" of the Losers (real name top secret)
27: Greg Sanders' debut as the Vigilante
29: Birthday of James Bartholomew (Jimmy) Olsen
30: Birthday of Dag Wentim (Stone Boy) of the Legion of Substitute Heroes
December
- 1: Dr. McNider becomes Dr. Mid-Nite
- 3: Birthday of Adam Strange
- 4: Batman's first case
- 5: Birthday of Mr. Mind, world's wickedest worm
- 7: Birthday of Harvey Dent (Two-Face)
" :
All-Star Squadron is formed (1941)
8: Birthday of Nura Nal (Dream Girl)
9: Birthday of Oliver Queen (original Green Arrow)
11: Birthday of Len Snart (Captain Cold)
13: Birthday of Sylvester Pemberton (golden age Star-Spangled Kid)
14: Birthday of Ulu Vakk (Color Kid) of the Legion of Substitute Heroes
16: Birthday of Lena Thorul (nee Lena Luthor) [1976 Super DC Calendar; placed on January 16 in Action Comics #297 (1963)]
18: Birthday of Ted Knight (golden age Starman)
19: Birthday of Princess Projectra
20: Abin Sur dies -- passes power battery and ring on to Hal Jordan
22: Birthday of Brek Bannin (Polar Boy), leader of the Legion of Substitute Heroes
23: Birthday of Billy & Mary Batson (Captain Marvel & Mary Marvel) [1976 Super DC Calendar; placed on April 1 in Shazam! #4 (1973)]
24: Infinity Inc is formed (1984 Pre-Crisis)
27: Birthday of Sir Justin (The Shining Knight)
29: Birthday of Georgia Sivana, world's wickedest girl
30: Birthday of Querl Dox (Brainiac 5)