I think, if I've nowhere to be, 3-4pm is ok to have a cheeky glass while doing tea for DD getting in from school (she's 15).
I have a 16 month old toddler who is fantastic, but sometimes, especially if I've been up since 5, the day seems soooooo long, so a nice glass of plonk just helps things along!!
My question is, how early is TOO early?!