If January 1st, February 12th, March 31st, July 4th, September 9th, November 11th, or December 25th falls upon a Sunday, the Monday following is a holiday. If November 11th falls upon a Saturday, the preceding Friday is a holiday.
If any holiday designated in Section 6700 falls on a Saturday, the board of supervisors of any county may by ordinance or resolution provide that an alternate day shall be a holiday for the employees of the county, except those employees of the county working as court attachés.