https://www.gamespot.com/articles/pokemon-go-septembers-community-day-is-this-week-h/1100-6461850/

The next Pokemon Go Community Day is nearly here. This month's event takes place this coming Saturday, September 22, and as usual, it'll give players a chance to capture rare Pokemon and take advantage of other in-game rewards for a brief window of time.

Live previous Community Days, this month's event will be held around the globe, but it will only run for three hours, and its timing will vary depending on which part of the world you live in. You can find the full schedule for each major region, as taken from the official Pokemon website, below.