On Saturday, 18 February 2017 11:07:43 UTC, wrote:
Yesterday got me thinking about this as I sat in the sun in our front garden in North London with temperatures nudging 13 deg in mid February. But on reflection I would describe yesterday as a mild late winter's day. Not quite warm enough and everything still too bare.

St. Val's day. It's no coincidence that it's around that date that even the dimmest realise that the Sun is higher in the sky, it's brighter, and there's a bit of warmth in it as well.