Holiversary 

The re-occurrence of a holiday, regardless of similar date to previous years, that holds a special meaning to a person because one of the previous celebrations of this holiday involved a major event (i.e. first date, starting a friendship, losing virginity, moving); if the holiday moves, than the "holiversary" moves too

"Dude I'm jewish and don't have any plans for easter, wanna hang out?"
"sorry man, me and my girlfriend are celebrating our holiversary since we met volunteering at a neighborhood easter-egg hunt last year."

Holiversary by Modern Byronic Hero February 28, 2010

homoversary 

a personal holiday celebrating the anniversary of one's coming out

We celebrated Dylan's 14th homoversary with pink tiaras and fruity cocktails.

homoversary by stankylegz143 May 21, 2011

himiversary 

The anniversary of Him, celebrated on the 5th of every month. The incident originally occured on the 5th of October, 2019 at 12:26 pm.

Josh: Happy himiversary, Juju!
Juju: The weather is nice on this fine himiversary, isn't it?

himiversary by asherastaff July 23, 2020

halfiversary

A couple's 6 month anniversary (similar to a half birthday).

Prem and Becky got married on July 11th, so they celebrated their halfiversary on January 11th.

halfiversary by Premdawg January 12, 2011

Homieversary 

The date where you and your home and/or homies became homies.

I cannot wait to go to Vegas this month for our homieversary!

Homieversary by PeshFromTx November 19, 2020

Heniversary 

The anniversary of a persons hen do. Usually this is celebrated by going on a night out and dressing up in traditional hen do attire.

Wow! Phoebe’s heniversary was so much fun!

Heniversary by Gibby, Guppy & Giblét September 6, 2023

Halfiversary

Like an Anniversary, but a celebration for six months in a relationship, friendship, etc..

Hey babe, its been six months! Happy Halfiversary!!

Halfiversary by Anonymously Jay October 13, 2016