I find folklore like this fascinating:

Swimming on Good Friday

A friend of mine swam at the split on a Good Friday and was stabbed by a needle fish. People just told her "well it is good friday ya know".

The locals up here have all kinds of reasons to stay out of the sea on Good Friday - 'You'll turn into a merman," "someone always drowns," etc.

Of course "well eet IS Lent u no" and "ppl no should go inna watta on Gud Friday" are common knowledge among locals. History does confirm that there is an increase in tragic happenings during Lent and on Good Friday.