I have about 4-5 users who want to have an webbased calender, how do i solve it, anyone got any ideas?

i have made one its very complex but my database structure was table1: Field=days(1 2 3 4 5 6...31)(this 12 times) and Field month (jan*31 feb*28....)and the Fields hour 8-9 9-10 .... and then a whole bunge of code who is really to complicated to tell you and probably my boss oned let me <img src=../images/dmxzone/forum/icon_smile_wink.gif border=0 align=middle>)
I hope i gave you a start greets dark....