The phrase "hath a good time" is an archaic version of "has a good time". The word "hath" is a conjugation of the verb "have" in the third person singular form. In IPA, "hath" is transcribed as /hæθ/ with a voiced dental fricative (/ð/) sound at the end. This spelling reflects the pronunciation of "hath" in early modern English. Nowadays, the word "has" is used instead of "hath" in standard English.