In The antiquities and history of Ireland (1705) by Sir James Ware and Sir John Davie, we find this:
The occasion of Black-Monday, and the Original remembrance thereof rose at Dublin. The City of Dublin, by reason of some great Mortality, being waste and desolate, the Inhabitants of Bristol flock'd thither to Inhabit, who after their Country manner, upon Holy-days, some for love of the fresh Air, some to avoid Idleness, some other for Pastime, Pleasure, and Gaming-sake, flock'd out of the Town towards Cullen's Wood upon Monday in Easter Week. The Bitanes, Tooles, (the Mountain Enemies) like Wolves lay in Ambush for them, and upon finding them unarm'd, fell upon them, and slew 300 men besides Women and Children, ...Also called "The Cullenswood Massacre," the event in 1209 was commemorated by Dubliners every year for a few centuries afterward.
|Hailstones from a storm in the Philippines|
*Calendar note: given the way Thanksgiving is calculated, today (the 22nd) is the earliest date that Black Friday can take place; the latest is 29 November.