Answer:

heyday

AnswerCrossword Clue
HEYDAYPrime time
HEYDAYPeriod of greatest popularity
HEYDAYGolden age
HEYDAYPersonal "prime time"
HEYDAYPeriod of greatest vigor
HEYDAYGolden years
HEYDAYPrime
HEYDAYBest of times
HEYDAYTime of greatest vigor.
HEYDAYPrime.
HEYDAYProsperous time
HEYDAYThe best of times
HEYDAYPeriod of greatest success
HEYDAYGolden period
HEYDAYPeriod of one's prime
HEYDAYTime of greatest prosperity