monthaversary 

instead, of the traditional yearly anniversary, a monthaversary occurs once a month and it is usually celebrated by younger couples who are grateful their relationship has even survived a month

Girl: Gosh I hope he doesn't forget out 5th monthaversary!

monthaversary by lizzy135 March 8, 2011

monthaversary 

n 1: The monthly recurring date of a past event, especially one of historical, national, or personal importance: a relationship monthaversary (monthiversary); the monthaversary of ones birthday (bithday).

2: A celebration commemorating such a date.

--------
n: the date on which an event occurred in some previous month (or the celebration of it)

In dumb down stupid terms: A monthly anniversary, though usually only used in context for the first 12 months

Today is the 2nd monthaversary of that nasty hurricane that hit two months ago

monthaversary by Alex Donaldson October 16, 2005

Monthaversary 

The reccurrence of an event on the same date every month. Like a relationship for instance.

Happy Monthaversary Jonathan!

Monthaversary by GabrielahSparx November 29, 2010

Monthiversary 

Similar to anniversary, but occuring every month. For people who are overzealous about a new relationship.

Cara and Sloopy's monthiversary is January 5, 2008.

Monthiversary by Cara and Sloopy October 23, 2005

monthversary 

When a couple celebrates the month they`re together.

Happy monthversary mi niña!! Te Amo meLONcITA!

monthversary by Claudilicious September 17, 2007

Anni-Monthiversary

When you celebrate being with your significant other every month. But before completing a year together, it would just be a monthiversary.

When you celebrate your 1st Anniversary on the 15th of June, July 15th would be your 13th Anni-Monthiversary because it's 12 months + 1 month.

Anni-Monthiversary by Ranshan Gomez October 16, 2009

moniversary 

When couples celebrate each month they have been together because they have not been together long enough to celebrate a real anniversary. A ritual annoying to some.

"Happy 3 month moniversary, Joe! Only nine more months until our one year anniversary."

"Uh, gee, thanks. Was I supposed to get you a card or something?"

moniversary by FGCUmomz July 28, 2009