Board's deadline to give notice of insufficiency of claim (else sufficiency defenses waived)

910.8: "the board or the person may, at any time within 20 days after the claim is presented, give written notice of its insufficiency, stating with particularity the defects or omissions therein. The notice shall be given in the manner prescribed by Section 915.4. The board may not take action on the claim for a period of 15 days after the notice is given." 911: "Any defense as to the sufficiency of the claim based upon a defect or omission in the claim as presented is waived by failure to give notice of insufficiency with respect to the defect or omission as provided in Section 910.8, except that no notice need be given and no waiver shall result when the claim as presented fails to state either an address to which the person presenting the claim desires notices to be sent or an address of the claimant."

Gov. Code 6800: "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." Gov. Code 6804: "“Month” means a calendar month, unless otherwise expressed." Gov. Code 6707: "When the last day for filing any instrument or other document with a state agency falls upon a Saturday or holiday, such act may be performed upon the next business day with the same effect as if it had been performed upon the day appointed." 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."