Diary/Calendar managed with cms

Hi. We need a php/web programming expert to build a diary / calendar for our client's non-cms website. The diary will need to have its own user-friendly cms, so the client can enter data and manage events.

We already have a diary that we have created for another website. If you like, you can use that to build the diary, or use your own. We do not want to use any freely available php codes that are embedded with coders' logos.

Please note, you need to be able to provide an invoice for this work.

Deadline to finish the work is 10th of January. For your information, it's a low-budget project.