A new and better series of search functions has been added to the calendar.
It is now possible to search by convention type, using a drop down menu for a list and it is possible to do a keyword search as well, using a traditional search bar.
Note that calendar pages have replaced the site-wide search function with one specific to the calendar; if you use the general search (above the menu on non-calendar pages), to search for conventions, you won’t get the results you’re hoping for.
Other navigation tips: if you are deep into the calendar and want to get back to the main page, click on the events tab in the upper menu. There are also forward and back arrow links on most pages.