I agree Ratchet. Wilbur was blind a genetic thing so although wandered into the garden was always safe in doors by 10.
I also had another previous cat. You could set your clock by him. Out for breakfast at 7am and before work. Slept all day had his tea out in the garden for an hour, usually on top of the shed. Out for a quick widdle at 10pm back in for the night.
My vet told me cats should not be left out at night especially in cold weather, contrary to popular belief. I would worry anyway.
Wilbur retired with us to Lanzarote to live out his days in the sun.
We now tend to look after the strays and fill the feeding stations up with biscuits and water, plus good exercise for us humans