La. Civ. Code art. 1784
Current with operative changes from the 2024 Third Special Legislative Session
When the term for performance of an obligation is not marked by a specific date but is rather a period of time, the term begins to run on the day after the contract is made, or on the day after the occurrence of the event that marks the beginning of the term, and it includes the last day of the period.
La. C.C. § 1784