My friend & I just got tickets to see Funny Girl on March 3rd. We got them from SeatGeek, but my friend was on this Web site called NYTix for some reason, and saw that it lists a “closing date” of March 26th, 2023. I hadn’t seen a closing date announced & can’t see this confirmed anywhere else. Does anyone know? Is this just a random date this site threw in there? https://www.nytix.com/shows/funny-girl
The production has not announced a closing date. It could be that the current block of tickets is on sale through March 26th, so NYTix is just stating that is the closing date (as the previous poster mentioned, they are not a very credible source).
That being said, while the production has gotten a temporary boost from Lea Michele, it's still a question of how long it will be able to sustain that sort of business, especially in the historically slow months immediately after the holiday season ends.