 Just for that I'm going to launch my missiles.

 Weeell, it's against the spirit of the question, so I'll say it doesn't count.

I predict they will feature a Petrov Day market, which is something that a regular user cannot do.

 Good question. If it's a market that any one of us could have created, that's a NO. If it has some new features (e.g. the entire site goes down if its probability reaches a certain threshold), that's a YES.

Does creating a market count? If so, by whom?

This market resolves to YES if Manifold Markets does something on their website in an official capacity on 9/26/22 which is (in my judgement) clearly intended as an observance of 

. The observance must be on the website itself, not (e.g.) on Discord.

https://manifold.markets/charlie/will-manifold-markets-do-something

#	Name	Total profit
1	Sinclair Chen	M$126
2	Nathan Young	M$87
3	journcy	M$50
4	Multicore	M$14
5	Mr Stone	M$13

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