Que tengas una buena fiesta/buenas vacaciones
You can say holiday as fiesta, which also means party.
"Disfruta de tus vacaciones" is the way to say "Enjoy your holiday" in Spanish. It conveys a warm wish for someone to have a good time during their time off. You can also say "Que tengas unas felices vacaciones" for a similar sentiment.
Holiday: Festivo, feriado
día festivo
sin vacaciones
me- dee- ahh- de- fiesta
Ir de vacaciones
De vacaciones yo como
You may say 'horidei.'
Dia feriado or Dia de descanso
"Bueno" means good in Spanish.
Tenga(n) vacaciones estupendas!