It was announced that GGG vs Canelo will fight in September. September 17 is the date announced. It's been 4 years since their last fight.
https://www.boxing247.com/boxing-news/official-canelo-vs-golovkin-3-signed-for-september-17/222530
https://www.boxing247.com/boxing-news/official-canelo-vs-golovkin-3-signed-for-september-17/222530