6-Years' Nostalgia

The six years of permanent nostalgia you gain before existential realization. This mostly occurs between 4 and 10; though can bleed between and outside years.
Nostalgia is mostly found in non-dynamic music and environments, and their iconic features defined in your childhood.

A famous example of 6-Years' Nostalgia happened between 2008 and 2014, with gen-z of this time frame claiming it to be very different from other times.