Sister-state judgment entered in California: judgment debtor's motion to vacate within 30 days after service of notice of entry

[1710.40(b)] Not later than 30 days after service of notice of entry of judgment pursuant to Section 1710.30, proof of which has been made in the manner provided by Article 5 (commencing with Section 417.10) of Chapter 4 of Title 5 of Part 2, the judgment debtor, on written notice to the judgment creditor, may make a motion to vacate the judgment under this section. [1710.30(a)] Notice of entry of judgment shall be served promptly by the judgment creditor upon the judgment debtor in the manner provided for service of summons by Article 3 (commencing with Section 415.10) of Chapter 4 of Title 5 of Part 2.

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."