You feel it first one October morning when waking:

your breath crisp, your nose chilled

the sun still sleeping.

And before too long, other signs:

the apple trees dropping green-gold

walnuts, gloves, firewood for sale at the market

Then, you know for sure, when:

shadows stretch across the 5pm traffic

the collie with bristling fur pawing at your door before dawn

Confirmation of the change is received when:

it seems easier to go to the Moon than the bathroom at 1am

you search for the hot water bottle and electric heater

Finally, you admit autumn has become winter, when:

your body subconsciously seeks warmth away from drafts

you dream of swimming, of beaches, of naked golf