Now I obviously have no idea if this is true, but today my mom's neighbor told her:
"It's the fifth warm day of March in a row, today's the day to plant peas."
My mom told me this news this evening.
Coincidentally, I had planted my first round of peas today. The ground was moist but not mucky and it was lovely outside. The weeds and rocks were less than lovely, but you'll have this.
Since I really have no idea what I'm doing and just realized, "Oh dear! Peas are supposed to go in early!" I'm really quite reassured to know that this was the day my mom's neighbor felt peas should be planted. It's nice to happen to align with someone's schedule.
Here's hoping he knows what he's talking about!