I am currently setting up a new website for my dept at work.
one module of the site is training sessins.
We provide these sessions to clients.
The website we have is pretty old and usually has a list of the session name, time/date and location and some brief info about it with a registration link.
So we have like 30 or so of these.
I am not using any CMS btw.

My question is what is the best way to tie all the events together in the calendar system. Right now, If i change the session date, i have to go into the calendar page created in html and change that too and few other places where the session was advertised.

Any advice would be appreciated.
Thanks