January
7th January 1961 - Addison and Leona McKinnon's birthday
9th January 1961 - Severus Snape's birthday
10th January 1961 - Frank Longbottom's birthday
30th January 1961 - Lily (Evans) Potter's birthday
February
3rd February 1953 - Amelia Bones's birthday
8th February 1974 - Nymphadora Tonks's birthday
16th February 1980 - Cho Chang's birthday
19th February 1961 - Madeline Prewett's birthday
28th February 1940 - Jane (Princeton) Granger's birthday
March
6th March 1961 - Remus Lupin's birthday
11th March 1970 - Katherine Masters's birthday
19th March 1977 - Oliver Wood's birthday
21st March 1953 - Andromeda (Black) Tonks's birthday
24th March 1979 - James Potter's coming-of-age party
27th March 1961 - James Potter's birthday
27th March 1979 - The McKinnon Massacre; death-date of Adam and Marlene McKinnon, Samantha Goston, Madeline Prewett and her parents, and the rest of the McKinnon family.
April
1st April 1979 - Fred and George Weasley's birthday
13th April 1946 - Arthur Weasley's birthday
16th April 1980 - Katie Bell's birthday
18th April 1941 - David Potter's birthday
22nd April 1961 - Samantha Goston's birthday
May
4th May 1961 - Bellatrix (Black) Lestrange's birthday
12th May 1978 - Fleur Delacour's birthday
14th May 1961 - Peter Pettigrew's birthday
19th May 1982 - Luna Lovegood's birthday
20th May 1981 - Lavender Brown's birthday
29th May 1981 - Parvati Patil's birthday
June
5th June 1981 - Draco Malfoy's birthday
8th June - The date James Potter celebrated his 19th, 20th and 21st birthdays.
12th June 1977 - Penelope Clearwater's birthday
18th June 1979 - Lee Jordan's birthday
26th June 1961 - Sirius and Jennifer Black's birthday
26th June 1961 - Jessica Brown's birthday
30th June - End of school year at Hogwarts
July
2nd July 1959 - Hestia Jones's birthday
4th July 1979 - Alicia Spinnet's birthday
8th July 1981 - Daphne Greengrass's birthday
30th Jule 1981 - Neville Longbottom's birthday
31st July 1981 - Harry Potter's birthday
August
1st August 1980 - Wedding of James and Lily Potter
1st August 1982 - Disappearance of Jennifer Black
3rd August 1982 - Death of Regulus Black
4th August 1946 - Molly (Prewett) Weasley's birthday
9th August 1961 - Arabella Figg's birthday
11th August 1982 - Ginny Weasley's birthday
22nd August 1986 - Catherine Barter's birthday
September
1st September - Beginning of term at Hogwarts
2nd September 1980 - Blaise Zabini's birthday
4th September 1960 - Annabelle Princeton's birthday
14th September 1937 - Augusta Longbottom's birthday
19th September 1980 - Hermione Granger's birthday
30th September 1978 - Cedric Diggory's birthday
October
2nd October 1952 - Ted Tonks's birthday
6th October 1952 - Nathan Barter's birthday
18th October 1977 - Death of Annabelle Princeton
19th October 1960 - Amanda Cotswold's birthday
23rd October 1978 - Angelina Johnson's birthday
31st October 1982 - Disappearance of James and Lily Potter
November
1st November 1982 - 'Death' of Peter Pettigrew; arrest of Sirius Black
2nd November 1960 - Lucius Malfoy's birthday
3rd November 1931 - Emily (Black) Potter's birthday
6th November 1982 - Attack on the Longbottoms
14th November 1957 - Regulus Black's birthday
29th November 1965 - Bill Weasley's birthday
December
4th December 1960 - Emmeline Vance's birthday
6th December 1979 - Death of David Potter
9th December 1960 - Alice (Bones) Longbottom's birthday
12th December 1967 - Charlie Weasley's birthday
21st December 1954 - Meredith Barter's birthday
30th December 1959 - Narcissa (Black) Malfoy's birthday