Timeline

This article is a timeline of events and dates related to the Hazbin Hotel universe. This page is divided into two timeframes between Earth and Hell, in order to account for the vague portrayal of time within the series and ambiguity between Earth years and Hell years.

1800s

 * c.1840s - Sir Pentious is born in this decade on an unspecified date.
 * c.1880s - Tom Trench is born in this decade on an unspecified date.
 * 1888 - Sir Pentious dies and arrives in Hell.
 * c.1890s - Husk is born in this decade on an unspecified date.

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

1980s

 * Cherri Bomb dies sometime in this decade and arrives in Hell.

1990s

 * 1992 - Katie Killjoy dies sometime in this decade and arrives in Hell.

21st century

 * January 8, 20XX - Mrs. Mayberry kills her husband Jarold after finding him having an affair with Martha and then kills herself. Sometime later, Mrs. Mayberry arrives in Hell.
 * 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.
 * 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.
 * 202X - Azathoth's Tears are going to be visible that night, but 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.
 * July 13-17, 202X - Moxxie leads his first mission on Earth with Millie, while Blitzo looks for his estranged twin sister throughout Hell.

Expansion of the Universe

 * Lucifer and Lilith convince Eve to eat the Fruit of Knowledge to grant her free will. However, this act of defiance allowed Evil to take hold in the universe and spawned a pit of darkness and sin. For their actions, the Elders of Heaven banished Lucifer and Lilith into the realm they inadvertently created.

30-21 years ago

 * Millie is born roughly 27 years ago.
 * 25 years prior to Blitzo stealing Stolas's Grimoire, on Stolas' birthday, 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.
 * Loona is born 22 years ago.

20-11 years ago

 * 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.

10-1 years ago

 * On an unspecified date, Stolas tells a young Octavia about Azathoth's Tears, which only come around once every thousand years.
 * On an unspecified date 9 years prior to "MAMMON'S MAGNIFICENT MUSICAL MID-SEASON SPECIAL (ft Fizzarolli)", Fizzarolli achieves his first win in Mammon's annual clown pageant.
 * After Fizzarolli becomes Mammon's new brand figure, the pair advertise Mammon's new brand and the Robotic Fizzarolli's.
 * On an unspecified date 7 years prior to "Overture", Lilith stopped being in contact with Charlie.
 * On an unspecified date 7 years prior to "Radio Killed the Video Star", Alastor left Pentagram City some time after having almost beat Vox.
 * A year prior to "Ozzie's", Moxxie and Millie get married to each other.

Unknown dates

 * I.M.P is founded on an unspecified date.
 * 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.
 * 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.

Hazbin Hotel

 * After the recent Extermination concludes, Charlie pitches the Happy Hotel on the 666 News, but gets critically panned. Alastor returns to Pentagram City, offers his help to Charlie, and changes the hotel name to "Hazbin Hotel".
 * A week after the extermination, Charlie goes to the Heaven Embassy to discuss her plan to the head of the Exorcists, Adam, who informs that the extermination is going to occur 6 months early.

Helluva Boss

 * Martha and her entire family are killed by the actions of the I.M.P.
 * Stolas tells Blitzo about the upcoming Harvest Moon Festival that is his annual duty for the Wrath Ring. Blitzo and I.M.P go to the festival and stay at Millie's parents house where Striker attempts to assassinate Stolas.
 * 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 - Azathoth's Tears are going to be visible that night, but 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 attempts to kill him before Stella calls off the hit, and escapes after his battle with Moxxie and Millie. Stolas is badly wounded and is taken to St. An's Hospital in the Sloth Ring.
 * For about a week, Blitzo looks for his estranged twin sister throughout Hell, while Moxxie leads his first mission on Earth with Millie.
 * 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. Fizzarolli misses the rehearsal for Mammon's clown pageant.
 * On an unspecified date, Fizzarolli competes in Mammon's annual clown pageant, with Blitzo as his bodyguard, where Fizzarolli quits working for the Sin.