Answer:

HALCYON

Answer	Crossword Clue
HALCYON	Like carefree days of youth
HALCYON	Tranquil
HALCYON	Joyful and carefree

HALCYON	Calm
HALCYON	Untroubled
HALCYON	Kingfisher.
HALCYON	Peaceful.
HALCYON	Serene.
HALCYON	Peaceful
HALCYON	Idyllic
HALCYON	... days (happy time in the past)

HALCYON	Idyllic, like a past time

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.