When/how are IPO dates released?

> When/how are IPO dates released?

Once the SEC declares a registration statement "effective," the company is subject to the Exchange Act's reporting requirements. Theoretically one can do this and not list one's shares. That's dumb, so nobody does it.

In practice, we'll get a couple weeks to possibly days ahead of the listing. That process is partly governed by the SEC accepting the company's S-1. It's mostly down to negotiations between the company, its underwriters and IPO investors.