Starting this season Dorna seemed to provide an official ICS file for the calendar. It’s available here.
Unfortunately they did’t updated it with the full schedule of the events and left it as a generic DAY1, DAY2, DAY3 calendar wich is pretty useless. I waited as long as possible thinking they would update it but it seems they are not doing it (I even contacted them a couple of times)
So here are the caledars for this season:
ICS files extracted from https://www.motogp.com/en/calendar
All sessions
Qualify + Races Only
Races Only
You can find alternatives calendars at mototiming.live or at rushsync.com
ICS files extracted from https://www.worldsbk.com/en/calendar
All sessions
Superpole + Races Only
Races Only
Previous years calendars available as archive here: