English Halcyon (adj.)Denotes a period of time in the past that was idyllically happy and peaceful.

Ex: "the halcyon days of the mid-1980s, when profits were soaring" I wish this word would make a comeback. The "good old days" works, but you could use halcyon more flexibly like saying "The halcyon lifestyle of 1920s NYC". *The definition and example above are from Oxford Languages Definition from Merriam-Webster: characterized by happiness, great success, and prosperity : —often used to describe an idyllic time in the past that is remembered as better than today*