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These things are usually within the first week or two of the month. However, there have been rumors of this one happening later, perhaps toward October.
If it happens later, expect a possible dual-purpose event (iPhone/Watch/iPad or iPhone/Watch/Mac). However, now that the events are conducted virtually, the press do not have to travel, so Apple could cram them closer together. However, however [sic], Apple also like to spread their events out so that each release can have its time in the sun.
My gut would tell me to suspect an iPhone/Watch/Airpods event next week, and then an iPad/Mac event toward the end of October. But this is weird season, so expectations must be shelved and we'll have to take what they give us.