Timeline

This article is a timeline of events and dates related to the Hazbin Hotel universe.

1800s

 * c.1840s - Sir Pentious is born in this decade on an unspecified date.
 * 1871 - The royal family portrait is taken.
 * c.1880s - Tom Trench is born in this decade at an unspecified date.
 * 1888 - Sir Pentious dies and arrives in Hell.
 * c.1890s - Husk is born in this decade on an unspecified date.

20th century

 * On Stolas' birthday 25 years before the start of Helluva Boss, Stolas learns of his life duties and receives a grimoire and news of engagement to Stella from his father, Paimon, who also takes him to a circus where he meets Blitzo for the first time.

1900s-1910s

 * Alastor and Angel Dust are both born sometime in this decade.
 * Baxter dies sometime in this decade and arrives in Hell.
 * Tom Trench dies sometime around World War I and arrives in Hell.

1920s

 * Niffty is born sometime in this decade.
 * Mimzy dies sometime in this decade and arrives in Hell.

1930s

 * 1933 - Alastor is killed and arrives in Hell, where he uses his raw power to wreak havoc and became feared as the "Radio Demon".

1940s

 * 1947 - Angel Dust dies of a drug overdose and arrives in Hell.
 * Katie Killjoy is born sometime in this decade.

1950s

 * Vox dies sometime in this decade and arrives in Hell. Like Alastor, he gains raw power and becomes a powerful and feared Overlord..
 * Niffty dies sometime in this decade and arrives in Hell.

1960s

 * Cherri Bomb is born sometime in this decade.

1970s

 * Husk dies sometime in this decade and arrives in Hell.

1980s

 * 1981 - Imp City is founded in Hell.
 * Cherri Bomb dies sometime in this decade and arrives in Hell.

1990s

 * Vaggie is born around this decade at an unspecified date.
 * 1992 - Katie Killjoy dies and arrives in Hell.

21st century

 * On an unspecified date, Blitzo and Fizzarolli attended Mammon's concert where he announced the start of his annual clown pageant.
 * On an unspecified date 15 years prior to "Oops", Blitzo accidentally causes a fire that burns down his families imp circus, wherein Fizzarolli became horribly disfigured by the flames.
 * On an unspecified date, Stolas tells a young Octavia about Azathoth's tears, which only come around once every thousand years.
 * I.M.P is founded on an unspecified date.
 * January 8, 20XX - Mrs. Mayberry kills her husband Jarold and then kills herself after finding him having an affair with Martha. Mrs. Mayberry later arrives in Hell.
 * Months prior to the events of "Unhappy Campers", Barbie Wire checks out of rehab from St. An's Hospital and gets a job as a drug dealer.

2010s-present

 * On an unspecified date 10 years prior to "MAMMON'S MAGNIFICENT MUSICAL MID-SEASON SPECIAL (ft Fizzarolli)", Fizzarolli achieves his first win in Mammon's annual clown pageant.
 * 2014 - Vaggie dies and arrives in Hell.
 * 20XX - Stella hosts a "Still Not Divorced" party where Blitzo attempts to break into Stolas' study. After a night of sex with Stolas, Blitzo successfully steals Stolas's Grimoire and Stolas yells at Stella about a possible divorce.
 * Shortly after the annual extermination concludes, Charlie pitches The Happy Hotel project, which gets critically panned.
 * The Immediate Murder Professionals successfully assassinate Eddie.
 * Martha and her entire family are killed by the actions of the I.M.P.
 * Spring - Verosika Mayday and Blitzo make a bet over a parking spot before Verosika performs on Earth and loses the bet to I.M.P.
 * December - Loopty Goopty dies from accelerated aging and arrives in Hell. Shortly after, his business partner, Lyle Lipton, is killed by a falling piano and arrives in Hell.
 * Stolas tells Blitzo about the upcoming Harvest Moon Festival that is his annual duty for the Wrath Ring. Blitzo and I.M.P to go the festival and stay at Millie's parents house where Striker attempts to assassinate Stolas.
 * Blitzo and Moxxie get kidnapped by D.H.O.R.K.S and have truthful hallucinations due to inhaling truth gas. Millie and Loona rescue Blitzo and Moxxie until Stolas comes to take the four home while agents One and Two had been recording everything.
 * Moxxie takes Millie to Ozzie's to celebrate their one-year wedding anniversary. In order to stalk Moxxie and Millie, Blitzo takes Stolas on their first "date" to Ozzie's as well, where the four are mocked by Asmodeus, Fizzarolli, and Verosika Mayday. During this time, Loona was attending a party she was invited to by Vortex.
 * Later the same night after the events at Ozzie's, Blitzo is convinced by Loona to stay at Beelzebub's party.
 * After his date with Blitzo, Stolas gets into a fight with Stella where he demands she leave his mansion and instigates a divorce.
 * Wednesday, 20th, 202X - The Azathoth's Tears event is going to occur that night as Stolas is preoccupied moving Stella's belongings out from his home, Octavia steals Stolas's Grimoire from I.M.P Headquarters and accidentally goes to Los Angeles on Earth, prompting Stolas and I.M.P to search for her.
 * On an unspecified date, Crimson invites I.M.P. to his mansion for an arranged marriage with his son to Chazwick Thurman. The wedding is interrupted and called off the next day, after which Crimson has Chaz executed for deceiving him.
 * On an unspecified date, Striker captures Stolas and escapes after his battle with Moxxie and Millie. Stolas is badly wounded and is taken to a hospital in the Sloth Ring.
 * July 13 to 17, 202X - Moxxie leads his first mission on Earth with Millie while Blitzo looks for his estranged twin sister throughout Hell.
 * The following week from Stolas' hospitalization, Blitzo and Fizzarolli are captured and escape from Striker and Crimson while a fully recovered Stolas meets with Asmodeus about Asmodean Crystals.
 * On an unspecified date, Fizzarolli competes in Mammon's annual clown pageant, with Blitzo as his bodyguard, where Fizzarolli quits working for the Sin.