Antonyms of noun rest_day

1 sense of rest day

Sense 1
rest day, day of rest -- (a day set aside for rest)
       Antonym of workday (Sense 1)
      => workday, working day, work day -- (a day on which work is done)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun rest_day

1 sense of rest day

Sense 1
rest day, day of rest -- (a day set aside for rest)
       => day of the week -- (any one of the seven days in a week)