January
6th - Actor Eddie Redmayne (Newt Scamander)
9th - Severus Snape
30th - Lily Evans
February
3rd - Actor Warwick Davis
6th - Arthur Weasley
8th - Composer John Williams
13th - Luna Lovegood
17th - Actress Bonnie Wright (Ginny Weasley)
21st - Actor Alan Rickman (Severus Snape)
22nd - Actress Julie Walters (Molly Weasley)
25th - Actors James and Oliver Phelps (Fred and George Weasley)
27th – Actor Timothy Spall (Peter Pettigrew)
March
1st - Ron Weasley
9th - Sybil Trelawney (Before 1962)
10th - Remus Lupin
13th - Actor Harry Melling (Dudley Dursley)
20th - Actor David Thewlis (Remus Lupin)
21st - Actor Gary Oldman (Sirius Black)
27th - Actor Adrian Rawlins (James Potter), James Potter
28th - Director Mike Newell (Goblet of Fire)
30th - Actor Robbie Coltrane (Rubeus Hagrid)
April
unknown - Teddy Lupin
1st - Fred & George Weasley
14th - Arthur Bowen (Albus Severus Potter),
15th - Actress Emma Watson (Hermione Granger), Actress Emma Thompson (Sybil Trelawney)
28th - Horace Slughorn
May
1st - Griphook
2nd – Victoire Weasley
13th - Actor Robert Pattinson (Cedric Diggory)
15th - Professor Pomona Sprout
19th - Actress Geraldine Somerville (Lily Potter)
24th - Actor Jim Broadbent (Horace Slughorn)
26th - Actress Helena Bonham Carter (Bellatrix Lestrange), Actor Will Dunn (James Sirius Potter)
June
5th - Draco Malfoy
6th - Actor Jason Isaacs (Lucius Malfoy)
23rd – Dudley Dursley
27th - Actor Matthew Lewis (Neville Longbottom)
28th - Dobby the house elf
4th - Actor Ryan Turner (Hugo Weasley)
10th - Actress Fiona Shaw (Petunia Dursley)
23rd - Actor Daniel Radcliffe (Harry Potter)
26th - Producer David Heyman
30th - Neville Longbottom
31st - Actor Richard Griffiths (Vernon Dursley), Harry Potter, & JK Rowling
August
11th - Ginny Weasley
16th - Actress Evanna Lynch (Luna Lovegood)
17th - Actress Helen McCrory (Narcissa Malfoy)
22nd - Actor Mark Williams (Arthur Weasley), and Percy Weasley
23rd - Composer Alexandre Desplat
24th - Actor Rupert Grint (Ronald Weasley)
26th - Dolores Umbridge
25th - Actor Simon McBurney (Kreacher)
September
4th – Actress Ellie Darcey-Alden (Young Lily Potter)
10th- Director Christopher Columbus (Director of Sorcerer's Stone and Chamber of Secrets)
19th - Hermione Granger
22nd - Actor Tom Felton (Draco Malfoy)
October
1st - Actor Richard Harris (Albus Dumbledore)
4th - Minerva McGonagall
17th - Filius Flitwick
19th - Actor Michael Gambon (Albus Dumbledore)
30th - Molly Weasley
November
1st - Actress Natalia Tena (Nymphadora Tonks)
3rd - Sirius Black
8th - Actor Chris Rankin (Percy Weasley)
28th - Alfonso Cuaron (director of Prisoner of Azkaban)
29th - Bill Weasley
30th - Director David Yates
December
2nd - Actor Alfred Enoch (Dean Thomas)
4th – Actress Gemma Jones (Madam Pomfrey)
6th - Rubeus Hagrid
7th - Mary Lou Barebone
10th - Actor Kenneth Branagh (Gilderoy Lockhart)
12th - Charlie Weasley, Actor Bill Nighy (Rufus Scrimgeour)
22nd - Actor Ralph Fiennes (Voldemort)
23rd - Actress Alison Sudol (Queenie Goldstein)
28th - Actress Maggie Smith (Professor McGonagall)
31st - Tom Riddle / Voldemort
Unknown Full Birthdates:
Students born between the late 1970s and early 1980s, but the exact date is unknown: Pansy Parkinson, Katie Bell, Cedric Diggory, Seamus Finnigan, Gregory Goyle, Colin Creevey, Marcus Flint, and Oliver Wood
Holy Days:
July 31st 1965, 1980: JK Rowling and Harry Potter's Birthdays
October 31, 1981, 1991: The day Harry Potter defeated Lord Voldemort; The day Harry, Ron, and Hermione became friends.
December 31, 1926: Only Lord Voldemort could completely ruin New Year's Eve
June 24, 1995 and June 17, 1996: The days the Second Wizarding War began.
June 26, 1997: The day Harry Potter was first published.
May 2, 1998: The Battle of Hogwarts
Holy Birthdays:
July 31, 1980 — Birth Of Harry James Potter (And J.K. Rowling's Birthday)
March 1, 1980 — Birth Of Ronald Bilius Weasley
September 19, 1979 — Birth of Hermione Jean Granger
July 30th, 1980 - Neville Longbottom
February 13th, 1981 - Luna Lovegood
August 11th, 1981 - Ginny Weasley