I'm not English but I suppose you know that. I didn't make England adopt SI, nor the rest of the world. But it is a system that is logical and hangs together without all the conversion factors that Imperial measures require. I don't need to know that an acre is 4840 square yards.You may rather say you are in the second half of your life meant for new goals to have and achieve,e.g making at least England to adopt SI units in air conditioning field, apart from your goal of long walk with your dog.
And walking the dog..........that's not a goal, it's a necessity.......
But he is a really a very good boy. He leaps and gallops in metres, runs in kilometres, weighs about 35kg, and is as strong as a two tonne ox...........
Enjoy your non SI day...........