Current Calendar:

July 1776
  4: Carli

October 1977
  5: The Ultimate Warlord

November 1984
  4: KARR

December 1999
 31: Neal1231 (I saw the post with 12/31/99 and asked for clarification)

September 2009
  2: Fie
  9: Archmagister Gaenigerus
 10: man-man
 11: Zehd
 14: Phariad
 20: Attention Whore
 26: marblecake
 29: ATHEISM IS ****ING HILARIOUS
 30: Windangel

October 2009
  2: 1337xxxxxxxxxlolololololololololxxxxxxxxx1337
  7: BidSquid
  8: JayZJay
  9: WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
 10: CrinkzPipe
 11: fine upstanding member of society-male reproductive organ
 12: El Saico
 13: ChilePepino (Authorized edit; somebody already took the date he guessed)
 14: Fran
 15: Fingerz
 16: Dr Death
 17: Plato Shrimp
 18: SanDyk
 19: Master Troll
 20: d4
 21: jdwithavengeance
 22: ERECTILE_DEATH
 23: Techno_Viking
 24: Johnny Mac
 25: dobnits (who?)
 26: An amiable personage
 27: Sacra H
 28: Cyber Cypher
 29: Kate Kusanagi
 30: Kid Banhammer
 31: Shii

November 2009
  1: Vageena Davis
  2: bumtroNAUGHTy
  3: Asuka424
  4: mterek
  5: Apprentice_Troll
  6: Master_Troll
  7: Judge-Bot 3000
  8: Jalapeno_Bootyhole
  9: Skyman747
 10: Joseph of Suburbia
 11: MC Banhammer
 12: wtfmcnuggets
 13: Afterthotz
 14: -MLF-
 15: Melody Leigh
 16: Psycho the CIC
 17: The God Damn Batman
 18: OMG OMG OMG I AM A male reproductive organSUCKING WHORE
 19: Aldo_Anything
 20: momentumenergy
 21: Dolores Haze
 22: WoweeZowee
 23: Dunatis
 24: J H Christ
 25: Catt although
 26: Bizarro dobnits
 27: apocalypse_now
 28: Bandaney
 29: Steve Dallas
 30: Lady Banhammer

December 2009
  1: MC Banhacker
  2: Canada
  3: Ricket
  4: France
  5: Germany
  6: Switzerland
  7: Kongming
  8: Little-Rena
  9: TUBSWEETIE
 10: ragingwincesthardon
 11: Italy
 12: quangntenemy
 13: spacekadt
 14: Zhou Yu
 15: Fortunato
 16: Japan
 17: iSecksMachine
 18: Russia
 19: Blood So Toxic
 20: Greasy Joe
 21: Michiyo
 22: Shishi
 23: scabie
 24: Sarcasm Inc
 25: King Krimson
 26: Somebody
 27: tire_fire
 28: Sick_Hacker
 29: Ack Thbbbt
 30: Igor512
 31: Chawin

January 2010
  1: Trolly McTrollerson
  2: Lewis Carroll
  3: BUNNI_RAPE
  4: Vajas
  5: msg
  6: EvilVonBaronsen
  7: bl_nk
  8: sankdog
  9: lordofawesome
 10: HackerOnHacker
 11: Shiny Turtle
 12: narutard
 13: FunJelly8
 14: male reproductive organ Tardfart
 15: dragonchips
 16: WeChall
 17: iostiogic
 18: United Kingdom
 19: United States
 20: Finis Valorum <- RELEASE DATE!
 21: Chronic-Boy
 22: DO NOT BAN SG94 SHE IS ACTUALLY P COOL
 23: fat
 24: ricketthunderjesus gets you LIGHTNING IN YOUR FIST
 25: good post upvoted
 26: NOMNOMNOMNOMNOMNOMNOMNOMNOM
 27: not a spai
 28: Not a spy
 29: Velguador
 30: nTerra
 31: hoosahokie

February 2010
  1: DiscothequeEnnui
  2: KingKloskowski
  3: Mister Pugs
  4: Gary_Oak
  5: Notebooked
  6: Mask
  7: Essex-Tacy
  8: Advocato
  9: CaptainDDL
 10: UnlimitedTyyppi
 12: EvilHom3r
 14: SuperMonkeyMan
 15: Nikolos
 16: leftalon2cry
 22: Potilas
 28: Snot Match

March 2010
  3: aksealman
  7: 800beloved
 10: Luria
 15: Bigandtasty
 29: Bob_Bobface

April 2010
  1: AAHZ
 10: Hapless Poaster
 11: hypert
 20: Neo King Ghidorah

May 2010
  1: Doktor Jojo (Date was originally posted as Judge-Bot 3000, but he was ineligible.)

June 2010
 12: spongebob-scout (I saw the post with 6/12/2010 and asked for clarification) 

October 2010
 10: StrangeVicious52

November 2010
 16: rambell

December 2010
 15: EmSee Hambanner

February 2012
 29: ghax

December 2012
 13: Inertia
 21: Cheins Sanchez (If the world isn't gone by then...)

November 2017
 11: Giant Turd

October 2057
 16: Lee_Harvey_Oswald (Quite optimistic.)

December 9999
 31: Russell The One-Eyed Wonder Muscle