When they are fully operational the events submission tools require both a username (this is a pseudo-user, not an account at math.ufl.edu) and a password. If you are the reporter or contact person for a seminar, please send mail to www@math.ufl.edu and we will provide the username and password; these are used pretty much the way your regular username and password are employed at login.
If you are the contact person for a seminar with a regular schedule then you might want to salt the basic facts (title, time, room, and web page or contact information) away in a file you can consult when you submit a new item. Just use cut-and-paste in the window system to fill in the routine stuff, saving typing and errors.
You can include HTML in your submissions if you want to make the name of a person, talk, or seminar serve as a link to a Web page, or if you want to reproduce umlauts and other accents.
You may find it useful to start a second window in your Web browser if you need to consult a calendar or old events entry while you work on a new submission.
Do not panic if you send in an erroneous submission. Make a corrected entry, with a comment which flags it as a correction, and then send mail to www@math.ufl.edu asking that the bad version be deleted from the appropriate week/day file.