Depends a lot on how well insulated your house is. We used to live in a stone built Victorian house with very thick walls, which acted like a storage heater in winter and prevented solar gain in summer. Our current house is 1930, and the temp drops much quicker in winter.Christ!
Ours goes off an hour before we go to bed and doesn’t come on until 7.
House never yet gone be low 14 degrees overnight.