It being too cold yet to go about in t-shirts or boxers.

Exposition:

According to the Desk Calendar of Forgotten English, gift of stitchinmyside, if you're not wearing a spring of elm or hawthorn on May Day, the pranksters of the village (in this case, Cook Street Village) have the right to dunk you in the river.

Suggestion:

Water guns at sundown in the park on Tuesday (that's tomorrow), followed by hot chocolate at the Pakington Station tea shop? Takers?

{rf}

Also according to the calendar, tonight is Mischeif Night, when we swap shopkeepers' signs and leave symbolic branches outside each other's doors. Again: I'm game if you are.