BOC: Reverse fungus/Real World

[Andy C]

In "Vera Gemini" we have :

"On the 24th of May
I'll gather up your reins"

Why the 24th of May and what fascination does May have
to the Oyster boys ? I mean we have

"The Last days of May"
"Like silver scrapes in May" (Astronomy)
"The 24th of May" (Vera Gemini)
And there is a mention of May on "Heaven Forbid" but I can't remember
where and my copies at home.

Any ideas ?
Andy C