PAGA: LWDA investigation window, 120 calendar days after its decision to investigate

(B) If the agency intends to investigate the alleged violation, it shall notify the employer and the aggrieved employee or representative by certified mail of its decision within 65 calendar days of the postmark date of the notice received pursuant to paragraph (1). Within 120 calendar days of that decision, the agency may investigate the alleged violation and issue any appropriate citation. If the agency determines that no citation will be issued, it shall notify the employer and aggrieved employee of that decision within five business days thereof by certified mail. Upon receipt of that notice or if no citation is issued by the agency within the time limits prescribed by subparagraph (A) and this subparagraph or if the agency fails to provide timely or any notification, the aggrieved employee may commence a civil action pursuant to Section 2699.

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." 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." FRCP 6(a): "The following rules apply in computing any time period specified in these rules, in any local rule or court order, or in any statute that does not specify a method of computing time. (1) ... (A) exclude the day of the event that triggers the period; (B) count every day, including intermediate Saturdays, Sundays, and legal holidays; and (C) include the last day of the period, but if the last day is a Saturday, Sunday, or legal holiday, the period continues to run until the end of the next day that is not a Saturday, Sunday, or legal holiday."