Holidays for slaves or extra wages

"Because there were many Catholics in the area, the two days after Easter were considered holidays, and in 1796, when three hired slaves, Charles, Harry and Charley, attended two carpenters on the Monday and Tuesday after Easter, Hoban paid them three shillings and nine pence for each day in extra wages."

Quote from Slave Labor in the Capital, page 105

I was perhaps a bit wordy in sharing that fact which I suppose arose from my frustration that I couldn't write several paragraphs about the small receipt below that I found in the National Archives. The receipt is signed by two Irish Catholics, Hoban and Purcell, the superintendent and foreman, but judging from a payroll for carpenters for March 1796, Purcell did not take any days off. He was paid for 27 days, all the working days in March 1796.  However, as you can see from the carpenters' payroll that I put below that for the slaves, while Purcell worked every working day, the five slave carpenters under him only worked 25 days. So it is seems that at least some slaves got two days off because of the post-Easter holidays that other workers didn't get. Pinning down why those days were not holidays for everyone will take some digging. There is no evidence that free workers got extra pay for working holidays. I suggest in my book that many of the hired slaves came from a network of Catholic families. Were those slaves also Catholics and given a holiday or extra wages out of respect for their religion? Accepting that idea then perhaps the slaves had a spiritual overseer while they worked in the city who made sure they got those Catholic holidays or were paid if they had to work!