Translation of "Halcyon" in Japanese

My granny spoke longingly of the halcyon days of her childhood.

おばあちゃんは、なつかしむように、子供の頃の幸せな日々を語った。

Everyone remembers the happy days of youth as his halcyon days.

誰も、楽しい青春を平穏無事な時期として思い起こす。

Everyone remembers the happy days of his youth as his halcyon days.

だれしも、楽しい青春を平穏無事な時期として想い起こす。

Combat soldiers during peaceful moments like to reminisce of their halcyon days.

戦闘に携わる兵士たちは戦闘が止んでいるときに好んで、平穏無事な時代を想い返す。

We cannot expect to have halcyon days until we get safely through the crucial period in life.

人生の危機を無事、通り抜けてはじめて、平穏な時期を迎えることができる。