I do particularly remember other such days, notably one 31st October at least 20 years ago, when we were visiting Polesden Lacy (NT) with adult dds. There was glorious sunshine and blue skies all day, and it was 71 deg! (old money).
The very next day, 1st November, a complete change, to wet and windy - proper autumnal weather.
What's one health habit you've started that's actually made a difference?


