Today is the anniversary of the Great Ejection of 1662, the day by which ministers unwilling to conform to the Act of Uniformity were required to vacate their churches. The term Black Bartholomew's Day is often used as that was the so called saint's day. See my blog on the subject here. The book on the subject is still available.
It is a double anniversary as this is also the anniversary of the massacre of Protestants in Paris in 1572 known as the St Bartholomew's Day massacre. See the Wikipedia article here.