Cal. Code Civ. Proc. § 12 : —CALIFORNIA CODE OF CIVIL PROCEDUREPRELIMINARY PROVISIONS — Computation of time in which act provided bylaw to be done TEXT PDF The time in which any act provided by law is to be done is computed by excluding the first day, and including the last, unless the last day is a holiday, and then it is also excluded. Ca. Civ. Proc. Code § 12 Enacted 1872.