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
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.
(Keep in mind, this is not a real word, but it could be considered etymologically correct according to Latin and similar derivation to anniversary.)
Could be considered synonymous to lunaversary, a more common fake word for a reoccurring monthly event, but this is less etymologically correct by indirect induction of roots.
RIGHT: Happy second mensiversary!
"Actually it was there 6th Mensiversary..."