Save datas both in client side and in server side

Hi All,
I m newbie here,
When i run the tutorial that leads me to view the basic calendar it works perfectly with my basic database.
But i have a question,

Like default events in the scheduler comes from the backend which is entered by admin(say for example)

And i need those events/datas which will be entered by the users to be stored in the client side itself(like how we store in cookies).

Is there any way i can do like this !?

Can anyone kindly guide / refer me on how to do this…

Many thanks in advance.