To add/sync the calendar to your Apple, Google, Microsoft or other calendar, click the chain link icon in the top right corner.
Please note that Fremont has a new app/website for communication with parents called Konstella. It is best if you sync with your personal Konstella calendar instead of the above calendar. The above calendar has all school events and holidays. Your Konstella calendar will be updated more frequently, and also have your classroom events and activites you sign up for.