Washington, DC residents and folks who can get there, take note: There are some murmurings of a march on Trump’s inauguration in support of women’s rights, which the Republican platform is set to erode.

According to preliminary plans posted on Facebook, the march will take place on Saturday, January 21, the day after Trump is sworn in as America’s 45th president. The details of the event are not yet final, but organizers have launched individual Facebook groups in key states to help women make arrangements to be at the demonstration.

Over the past 24 hours, the organizers wrote that more than20,000 people have signed up to attend. “This is an INCLUSIVE march, and EVERYONE who supports women’s rights are welcome,” they added.

Connect with point people in your state here. And if you’re feeling furious, don’t boo—march. (Or do both. Doing both works, too.)

I’ll keep an eye out and signal boost the finer points when they’re settled.

USA, you’re going to need your #BlackMonday.

-Shiv