Golden Age -
(classical mythology) the first and best age of the world, a time of ideal happiness, prosperity, and innocence; by extension, any flourishing and outstanding period
period of time,
time period,
period an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"
golden age -
any period (sometimes imaginary) of great peace and prosperity and happiness
golden age -
a time period when some activity or skill was at its peak; "it was the golden age of cinema"