Leaders’ Climate Summit
The summit will be held on 22 April 2021, which is the fifth anniversary of the opening of the Paris Agreement on climate change for signature.
The US' Biden Administration has also indicated its intention to reconvene the Major Economies Forum. The first preparatory meeting of the Major Economies Forum took place in April 2009. Meetings of the MEF took place periodically through September 2016. Between 2017 and 2020, after the US' Trump Administration announced that it would withdraw from the Paris Agreement, Canada, China and the EU co-hosted four Ministerials on Climate Action.
[This description was taken from sdg.iisd.org]