which some people think is the beginning of Spring, which is obviously not true, as the latitude and climate determine the seasons, not the date.  No, it is in fact a moment in time, more precisely defined as when the earth is tilted neither towards the sun nor away from it, but when people say equinox, they usually mean the day on which this happens.  Anyway, it is a good excuse to feel more spring-like and buy spring flowers, and that sort of thing.