"기쁨의 시간"

Translation: A time of happiness

[iam4korea]

How about "a joyful time?"

[trevorist90]

It would likely have a different marker on the end like -은 instead of -의. This is literally "happiness' time" (note the possessive) or "time of joy".

[ThomasWelc4]

Time of joy, aka"happy hour".

[SashoNr1]

That was my take on it as well...