Yes that is the case. We use what we call spot-price electricity. The prices are announced at about 14:00 local time for the next day. Price peaks usually but not always happen at 11:00 and 20:00 but the low price spots change from day to day as does the price. I am using Control a water heater and ground source heat pump based on cheap hours of spot priced electricity to control my heating system and that is how I started thinking about also steering other home appliances to the cheap electricity hours.
Thanks to this discussion it dawned to me I could use as datetime item to indicate whether or not I want the drier to run and then let my heat pump control also start the drier at the absolute cheapest hours. This still needs a bit of thinking, but I am getting closer and also learning a lot at the same time.