When I install My Calendar this pops up:
Fatal error: Cannot redeclare my_calendar_today() (previously declared in /home/site/public_html/wp-content/plugins/my-calendar/my-calendar-widgets.php:8) in /home/site/public_html/wp-content/plugins/my-calendar/my-calendar-widgets.php on line 8
It shuts down the whole of WordPress, have to manually delete the my calendar plug-in directory to stop the error. It's the only calendar installed. It's odd that it seems to be declaring it twice on the same line.