Please note that the air conditioning in the rooms is controlled centrally by the hotel, therefore the air conditioning is only turned on during specific hours during the day which may vary. (kayak.co.uk)
Parents can set a device's «bedtime» so that it can't be used for anything except phone calls during specific hours of the day or night. (connectsafely.org)
Some salespeople in our area do employ their personal assistants for specific hours through a placement service. (realtormag.realtor.org)