A “Rise Up 4 Abortion Rights!” protest is planned for noon Thursday in Harvard Square by the group of the same name, part of a national day of action. Participants are asked to wear green if possible. A contingent of students at Cambridge Rindge and Latin School are expecting to march to the square from campus, a student said.

The goal is to “stop the Supreme Court from taking away the right to abortion,” according to posters advertising the protest – an outcome considered all but certain since the leak of a draft majority opinion created in February and written about May 3 by Politico. The draft has been confirmed as authentic by Supreme Court Chief Justice John Roberts, who said the decision wasn’t final. “The Supreme Court is on track to take away abortion rights within weeks,” event organizers say, urging people to walk out of school and work to show “that we will bring the gears of society to a grinding halt before we allow the Supreme Court to decimate abortion rights.”

Another public demonstration responding to events in the news is planned for 6 p.m. Friday at City Hall, 795 Massachusetts Ave., Central Square: a “Protect Our Children” vigil to honor the 19 children and two teachers killed Tuesday at Robb Elementary School in rural Uvalde, Texas.