What is Dies Amoris?

Legal Definition
A day of favor. The name given to the appearance day of the term on the fourth day, or quarto die post. It was the day given by the favor and indulgence of the court to the defendant for his appearance, when all parties appeared in court, and had their appearance recorded by the proper officer. Wharton.
-- Black's Law Dictionary
Legal Definition
A day of grace or indulgence.
-- Ballentine's Law Dictionary