Reuniversary 

The annual recurrence of a date marking a notable event of reuniting.

Every year we celebrate our reuniversary on the day we got back together after our short break-up.

Reuniversary by MelToddy March 30, 2010

Reziversary 

Main Entry: rez·i·ver·sa·ry
Pronunciation: rez-ə-ˈvərs-rē, -ˈvər-sə-\
Function: noun
Inflected Form(s):
plural rez-i·ver·sa·ries
Etymology: Metaverse Slang for recurring annually, from rezzing + anniversary.

1: the annual recurrence of a date marking the "rezzing" of an Avatar.

Valiant Westland just celebrated his 1st Reziversary in Second Life on March 3rd, 2009.

Reziversary by Valiant Westland March 4, 2009