Luniversary 

n the date on which an event occurred in some previous month.

Next week my girlfriend and I are celebrating our 6-month luniversary!

Luniversary by John W. Oates December 12, 2003

lunarversary

1. The monthly reccurence of the date of a past event; especially one of historical or personal importance.

2. The celebration or commemoration of such a date.

'Hey, it's the second lunarversary of the day you first called me a smutmonkey!'

lunarversary by Satouk October 4, 2011

Lunaversary 

Basically an anniversary but for months instead.

"How long have you and Todd been going out?"
"Our 4 month lunaversary is on saturday."

Lunaversary by Naki Vuk February 7, 2009

Universary 

The anniversary for an individual to be single. Generally a year, but could be used for any time period as long as you place the duration in front.

"Single and always ready to mingle! Happy eight months Universary!!"

Universary by CNKK217 September 30, 2012

Lungversary 

Annual Anniversary day of a successful Lung(s) Transplant.

Happy lungversary celebration of post Transplant

Lungversary by IPF Warrior June 28, 2018

Nuniversary 

The anniversary of a nuns final vows in the Catholic Church

Sister Linda celebrated her 30th Nuniversary the other day.

Nuniversary by Scumcious April 19, 2020

Universary 

a universal anniversary (basically a holiday)

The whole world had their 1st Universary of the survival of year 2012.

Universary by Shuck N' Jive November 7, 2009