My Calendar Part 1 - The 3 season year.

The summer Equinox was yesterday ....

Never heard of this one before, we just have a spring and autumn equinox. Is it special to Wales?

I find I'm too busy weeding and harvesting at the moment to think about sowing anything else that would need looking after. What with tomatoes, potatoes needing digging up, weeds everywhere, apples,pears, plums and cauliflower all coming at once and what do you do with 12 cabbages all at the same time.
If I planted one seed a week for 12 weeks, would they come in succession?