From the home page,you can access the new calendar by activating the dropdown menu "Attend" and clicking on "calendar".
If you scroll to the bottom of the page, you will see "submit". Click this and you can submit a whole lot of information, pictures and links to our new calendar.
I tried it yesterday and it works great.
However, I must approve all submissions, so make sure you only submit activities and events of interest to the martial art community.