This forum is really about helping people acquire and improve PHP skills. It is not about simply giving code to anyone who asks.
If you would like us to recommend existing products you can use, I'm sure someone will if they have any experience with anything appropriate, though you will probably need to give us some more information as to what it is you are looking for and what it needs to do. But do not expect anyone to simply write an "event calendar" application for you - most of us here who could do so tend to get paid for that sort of thing. 😉
