A grace period for paying a debt
Louisiana adopted a law in 1837 that made Christmas Day a grace period with regard to bill paying. So, if a debtor had a debt come due on Christmas Day, they would have until December 26, also known as Boxing Day, to pay it.
Accordingly, debtors would have one more day with their money, interest-free, while creditors would lose a day of interest. Official score in Louisiana: Debtor=1, Creditor=0.