synostalgia 

A feeling of longing for a time or place that has not been directly experienced, particularly a time before one's birth.

Meredith wears bell bottoms purely out of synostalgia. She was born in 1983.

synostalgia by SrBurrito August 20, 2010

snowstalgia 

The feeling that all snow from my childhood was deeper, lasted longer and came more often!

"When I was a kid, it snowed up to my armpits every weekend."

"Dude, get over it. You've got a wicked case of snowstalgia."

snowstalgia by EmmaSez December 22, 2008