For those looking for Rebirth's regular events, here is a list added by Draggynn:
Draggynn's post: https://forum.cityofheroesrebirth.com/index.php/topic,10.0.html (https://forum.cityofheroesrebirth.com/index.php/topic,10.0.html)
How to use Event Herald: https://forum.cityofheroesrebirth.com/index.php/topic,81.0.html (https://forum.cityofheroesrebirth.com/index.php/topic,81.0.html)