dateaversary 

Anniversary of your first date with your significant other, duh!

Today is our dateaversary😍

dateaversary by Kittylookshy June 12, 2016

Deathaversary 

The anniversary of someone’s death.

“My mom’s Deathaversary is on Christmas Eve.”
“I have three deathaversaries to deal with this month.”

Deathaversary by Rachee Mama May 11, 2019

Deathaversary 

Deathaversary is the anniversary of a death.

Today is the 3rd deathaversary of my dad.

Deathaversary by SierraFawcett February 11, 2019

dateiversary 

The anniversary of your first date.

"We went on our first date five years ago today! Happy Dateiversary!"

dateiversary by TheDogNerd July 22, 2013