Earliest I've had a daff flower was on Christmas day (south facing house with nothing in front to stop the sun) they were actually a few stragglers left over from some planted by my uncle Rhys in the late sixties! I haven't checked yet but there are some 'wild' daffs in an old hedge base up at the apiary which flower year on year I'll make a point of looking tomorrow.
I've seen snowdrops flower in the area on New years day, ours are usually poking their noses through the grass around Christmas and flowering in earnest mid January, but this year no sign at all of them although a few popped up and flowered on the 20th this year, it was weird, it was on the grave of old George our elderly dachsund who died between the UBKA convention and the tradex just before the first lockdown and I noticed them when I went up to dig the grave of Libby his lifelong kennel mate who had died earlier that morning.