Property Tax
Property taxes in California re governed by state law and collected by the county. The County Assessor determines the assessed value of the property.
The tax year and due dates are rather confusing. The Fiscal Year begins July 1 and ends June 30. November 1 is the due date for the first installment covering the period July 1 to December 31.
The second installment is due February 1 covering the tax period from January 1 to June 30.
This information is useful to calculate prorations you buy and sell. You can figure out whether you will be getting a credit or a debit.