As the G20 commences in South Africa, there are a number of in-person and online meetings taking place throughout the year;

https://g20.org/g20-events-calendar/

The aim of the G20 is to address major issues related to the global economy, such as international financial stability, climate change mitigation and sustainable development, through annual meetings of Heads of State and Heads of Government.

Find out more about the G20 on their website:
https://g20.org/