California Code, Education Code - EDC § 79030

Whenever climatic conditions of a community college district are such as to render it necessary that the colleges be closed as early in the year as possible or opened as late in the year as possible, the governing board of the community college district may maintain classes on any days other than the 25th day of December, the first day of January, the fourth day of July, and any day appointed by the President or the Governor for a public thanksgiving.

When classes are maintained on holidays pursuant to this section, proper exercises shall be held commemorating the day.