#day.work_time  the recurring hours when you are not sleeping (especially those when you are working); "my day began early this morning"; "it was a busy day on the stock exchange"; "she called it a day and went to bed"
  supertype:  work_time  a time period when you are required to work
  subtype:  workday__working_day__workingday  the amount of time that a worker must work for an agreed daily wage; "they work an 8-hour day"

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