holiday [holidays](period of one or more days taken off work for leisure and often travel) noun [UK: ˈhɒl.ə.deɪ] [US: ˈhɑːl.ə.deɪ]I'm on holiday. = Estoy de vacaciones.
vacation [vacations](the act of vacating something; moving out of something) noun [UK: vəˈk.eɪʃ.n̩] [US: veˈk.eɪʃ.n̩]I'm on vacation. = Estoy de vacaciones.