Despite the fact that lots of us, myself included, spent last weekend huddled round a log fire/radiator/bottle of whisky to escape the snow, it was officially the first day of spring yesterday. So this week’s word of the week is: equinox.

The equinox is when night and day last for the same amount of time. There are two a year, and Wikipedia tells me that it’s when the northern and southern hemispheres are equally illuminated (along with lots of other more complicated sciencey stuff). So that’s nice.

‘Equi’ means ‘equal’ and ‘nox’ means ‘night’ in Latin, which is weirdly logical for the English language. This one’s called the vernal equinox, vernal being from the Latin for spring, and the other one’s called the autumnal equinox which is, well, it’s just English isn’t it. There’s more on equinoxes here.