Amend or answer after ruling on demurrer

(g) Leave to answer or amend Following a ruling on a demurrer, unless otherwise ordered, leave to answer or amend within 10 days is deemed granted, except for actions in forcible entry, forcible detainer, or unlawful detainer in which case 5 calendar days is deemed granted. [...] (j) Time to respond after demurrer Unless otherwise ordered, defendant has 10 days to answer or otherwise plead to the complaint or the remaining causes of action following: (1) The overruling of the demurrer; (2) The expiration of the time to amend if the demurrer was sustained with leave to amend; or (3) The sustaining of the demurrer if the demurrer was sustained without leave to amend.

CCP 12: "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." CCP 12a(a): "If the last day for the performance of any act provided or required by law to be performed within a specified period of time is a holiday, then that period is hereby extended to and including the next day that is not a holiday. For purposes of this section, “holiday” means all day on Saturdays, all holidays specified in Section 135 and, to the extent provided in Section 12b, all days that by terms of Section 12b are required to be considered as holidays." CCP 12b: "If any city, county, state, or public office, other than a branch office, is closed for the whole of any day, insofar as the business of that office is concerned, that day shall be considered as a holiday for the purposes of computing time under Sections 12 and 12a." CCP 10: "Holidays within the meaning of this code are every Sunday and any other days that are specified or provided for as judicial holidays in Section 135."