go under Languages & Phrases , click on phrase manager, then click add new phrase.
Phrase Type: Global
varname: events_calendar
Text: is whatever you want, HTML usages is allowed. in your case you want in this box.
Events Calendar
then it should show up in your navbar once you edit the code. You of course do Not need to do all of this, you can of course edit the $vbphrase[calendar] to any text you'd like, but making a new global phrase allows you to use the phrase anywhere in the templates.
Hope this helps.
Awesome, yes that explains why it wasn't working (didn't know about this programming necessity!).