'aliturgic' originates from Greek, specifically the word 'alitourgikos', where 'a-' meant 'not' and 'litourgia' meant 'public service or liturgy'.

'alitourgikos' transformed into the Medieval Latin word 'aliturgicus', and eventually became the modern English word 'aliturgic'.

Initially, it meant 'not performing public service', but over time it evolved into its current meaning of 'a day without liturgy'.