Restolgia

[Re-stal-juh]

n. a wistful desire to return in thought or to a former time in life when on a nightly basis you were getting enough sleep.

Use: For most people, restolgia emerges when they enter high school, worsens when they receive their first full-time job, becomes unbearable when they have children, and vanishes when they lose the ability to see over a steering wheel and their license is taken away.