Alexandra Serebrennikova‎ writes:

Maybe this calendar will be helpful for those who wants to see all
the competition dates in one place. I made a calendar collecting all events 2020
I came across so far (about 50+). It gives a better overview when planning the
next season:

http://sashaz.com/hgcalendar

The main pros of this calendar that anyone can submit an event (please do so).
This is especially useful for small local competitions which are hard to get to
know about.

Filter by categories such as continents, locations, organizers, etc.

Agenda/monthly/tiles view.

Each event can be also imported into your personal Google calendar just by a
click of the mouse.

There are more functions - play around with it.

Also please spread the word/share this post, so potentially more hang gliding
people can contribute to the schedule.