Maniversary 

The annual celebration of a mans transition to his true gender.

-in regards to transgender Men

This July is Jordan’s third Maniversary.

Maniversary by jesas June 13, 2021

Maniversary 

The day celebrated by a man annually commemorating his first sexual encounter with his current sexual partner, which to him signifies the true start date of said relationship.

I was surprised with a gift of lube on my maniversary.

Maniversary by Mace702 January 10, 2014

maniversary 

A party with the bros to commemorate a year of broship.

Dude, Mark and I had our maniversary last night. We got wasted at the strip club and brought home some nasty hoes.

maniversary by aglifter October 12, 2009

Maniversary 

The anniversary of a guy becoming single. The celebration of a man getting his balls back.

Make sure you buy Paul some shots, it's his one year Maniversary!

Maniversary by Echo5Lima August 3, 2012

maniversary 

When your wife lets you invite a lot of people over, watch football, and drink a lot of beer on your anniversary.

Sunday was my maniversary. The Lions won 35-28.

maniversary by RestoreTheRoar January 8, 2012

amniversary 

A thankfully forgotten anniversary of a horrid event

I just realised, yesterday was the amniversary of my cancer diagnosis.

amniversary by nyaruk July 18, 2014

mensiversary 

MEN-SI-VER-SA-RY (mèn´se-vûr´se-rê) noun
1. The monthly recurring date of a past event, especially one of
historical, national, or personal importance: a first date
mensiversary; the mensiversary of the founding of Nerstone Pictures.
2. A celebration commemorating such a date.
from Latin: mensis, month + versus, past participle of vertere, to turn.

If the word for the commemoration of a yearly event is anniversary, by
analogy the logical word for the commemoration of a monthly event
should be "mensiversary." "Anniversary" comes from the Latin "annum,"
meaning year. (The "versary" part comes from a Latin word referring
to turning.) The Latin word for month is "mensis." Hence,
mensiversary. I've not found this word in any reputable dictionary,
but perhaps exposure in Google Answers can help to put it there.

Credit to pinkfreud-ga @ google answers

My girlfriend and I just celebrated our first mensiversary.

On November 2nd, the 8th mensiversary of our family reunion in Chicago, my family and I decided to take another trip back to visit the sites.

mensiversary by BeefnCheez November 11, 2007