California Code
CHAPTER 8 - Computation of Time
Section 6803.

6803. “Year” means a period of 365 days; “half year,” 182 days; “quarter of a year,” 91 days. The added day of a leap year, and the day immediately preceding, if they occur in any such period, shall be reckoned together as one day.

(Added by Stats. 1951, Ch. 655.)