1980

• July 31 - Harry James Potter born to Lily Evans Potter and James Potter

• July 31 - first birthday
• October 31 - near midnight - Voldemort attempts to kill Harry Potter after murdering his parents, but his spell rebounds. Voldemort is defeated.
• November 1, late evening - Hagrid delivers baby Harry to Dumbledore, who is waiting in Privet Drive to leave the baby with the Dursleys.

• spring - Aunt Marge comes to Dudley's fifth birthday party. She whacks Harry around the shins to keep him from beating Dudley at Musical Statues. 

1988

• spring - Aunt Marge comes to Dudley's birthday party, bringing a computerized robot for Dudley and a box of dog biscuits for Harry.

• July 31 - for his tenth birthday, Harry is given a coat hanger and a pair of Uncle Vernon's old socks

• spring - Aunt Marge comes to Dudley's birthday party, bringing Ripper, her favorite bulldog. Harry accidentally steps on Ripper's tail and the dog "trees" him. Marge finally calls the dog off around midnight. 
• spring - Harry unexpectedly finds himself coming along on Dudley's birthday outing to the zoo, where he accidentally releases a boa constrictor - he is locked in his cupboard until summer
• July 24 - 30  -  letters begin arriving via owl post to invite Harry to Hogwarts. 
• July 31, just after midnight - Hagrid rescues Harry from the Dursleys and from the Hut on the Rock 
• July 31 - visits Diagon Alley with Hagrid to buy his supplies, meets Draco Malfoy in Madam Malkin's shop
• September 1 - meets Ron Weasley (and Molly and the twins) on Platform Nine and Three Quarters, meets Hermione Granger aboard the Hogwarts Express - begins first year at Hogwarts, sorted into Gryffindor
• September 12 - first flying lesson for Gryffindors and Slytherins; Harry finds out he's a natural at flying and is made the Gryffindor Seeker
• October 31 - with Ron, fights a Mountain Troll and rescues Hermione. The three become friends.
• December 25 - Harry has the best Christmas of his life and receives his father's Invisibility Cloak for a gift
• Harry discovers the Mirror of Erised and sees his family for the first time in his life

• first week of June - Harry, Hermione, and Ron follow Quirrell after the Sorcerer's Stone, overcome the various protections, and defeat Quirrell/Voldemort's attempt to steal the Stone 
• July 31 - Dobby the house elf visits Harry Potter in Privet Drive; the Dursleys hold a dinner party for the Masons which is disrupted by a falling violet pudding
• early August - Ron rescues Harry from the Dursleys in a flying car 
• September 1 - Harry and his friends starts their second year at Hogwarts
• October 31 - 500th Deathday for Nearly Headless Nick (CS8) 
• October 31 - evening - Harry hears a voice threatening death and follows it to discover Mrs. Norris, Petrified

• the spirit-form of Voldemort is defeated by Harry Potter in the Chamber of Secrets
• July 31 - Harry's thirteenth birthday; Aunt Marge comes for a visit to the Dursley's.
• August 7 - On the last day of Aunt Marge's visit, Harry blows her up and runs away. The Knight Bus picks him up in Magnolia Crescent and drops him off at the Leaky Cauldron. 
• August 7 - August 30 - Harry stays at the Leaky Cauldron and spends his days in Diagon Alley. Quality Quidditch Supplies displays the new Firebolt broomstick. 
• August 31 - Harry meets Hermione and Ron in Diagon Alley. They are all staying at the Leaky Cauldron.
• September 1 - Harry and his friends begin their third year at Hogwarts, which is now surrounded by Dementors 

• June 6 - at sundown, Buckbeak is scheduled to be executed; Sirius Black is captured that evening and narrowly escapes suffering the Dementor's Kiss by riding to freeedom on Buckbeak 
• Monday, August 22 - Harry attends the Final of the 422nd World Quidditch Cup
• September 1 - Harry and his friends start their fourth year at Hogwarts
• October 31 - Goblet of Fire selects of the champions for the Triwizard Tournament - Harry is chosen
• Tuesday, November 24 - First Task of the Triwizard Tournament 
• December 25 - Yule Ball, 8 PM until midnight 

• February 24, 9:30 AM - Second Task of the Triwizard Tournament 
• June 24, at dusk - Third Task of the Triwizard Tournament 
• June 24 - Voldemort kidnaps Harry Potter and Cedric Diggory. Cedric is killed by Wormtail using Voldemort's wand. Voldemort is restored to his body in an ancient ceremony. The Death Eaters are called back to him and they gather. Voldemort and Harry duel and Harry manages to escape with Cedric's body.