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the date on which an event took place or an institution was founded in a previous week.
a wedding weekaversary
by jay-en July 28, 2018
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Weekaversary

Combination of a week and anniversary.

A milestone of an event that happened a week ago.
Happy Weekaversary (in reference to a couple having been married a week)
by Neleh June 09, 2018
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