Article 13Effect and Application of Laws

When the laws speak of years, months, days or

nights, it shall be understood that years are of three

hundred sixty-five days each; months, of thirty days; days,

of twenty-four hours; and nights from sunset to sunrise.

If months are designated by their name, they shall be

computed by the number of days which they respectively

have.

In computing a period, the first day shall be excluded,

and the last day included. (7a)