"These underwritten be the perilous days, for to take any sickness in, or be hurt in, or to be wedded on, or to take any journey upon, or to begin any work on, that he would well speed. The number of these days be in the year 32; they be these:
In January be seven: 1, 2, 4, 5, 7, 10, 15
In February be three: 6, 7, 18
In March be three: 1, 6, 8
In April be two: 6, 11
In May be three: 5, 6, 7
In June be two: 7, 15
In July be two: 5, 19
In August be two: 15, 19
In September be two: 6, 7
In October be one: 6
In November be two: 15, 16
In December be three: 15, 16, 17"
This is from my commonplace book, and no source is recorded. As I started writing in it in April 1974, and my reading at that point was still pretty eclectic, heaven knows where I found it, and I certainly can’t remember. It sounds like Thomas Tusser, but I suspect it’s actually that prolific author A Non.
I have to say that I've never paid it the slightest attention, beyond being pleased my birthday isn't included!