Cal. Sts. & Hy. Code § 6463
The interest shall be payable semiannually, by coupon, on the second days of January and July, respectively, of each year after the date of the bonds. The bonds shall bear the date of the 31st day after the date of recordation of the warrant, whether or not such date falls on a Sunday or holiday. The first interest coupon shall be for interest from the date of the bonds and shall be payable to the holder thereof on the January 2nd next succeeding the September 1st or the July 2nd next succeeding the March 1st, as the case may be, next following the date of the bond. The rate of interest shall not exceed the amount established pursuant to Section 53531 of the Government Code at the time the legislative body adopts the resolution of intention pursuant to Section 5132.
Ca. Sts. and High. Code § 6463