It was on the twenty-third of June, the day before the fair,
And Ireland's sons and daughters were all assembled there.
The young, the old, the brave and the bold came to sport and thrill,
There were curious combinations at the fair of Spancil Hill.

And those muir men -- if I remember correctly, it's Lammas tide (beginning of August) when they get their hay in. Martinmas is in the middle of November.