I have been working at this Google calendar for a few hours. I have added PSP, NPPL, TPA Cup, MSXL, Kee RT2, HK Army Events, and the Paintball Plex Practice schedule. It also has sunrise/sunset times for event days, major holidays, daylight savings, and tax day.
It is lacking scenario events, trade events, and any other events unknown to me.
If you have a google account you should be able to import this calendar into your account so you can use it as needed. Enjoy!
P.S. If anyone knows how to keep colors and formatting on these public calendars I would be appreciative of the knowledge.