The Russian authorities canceled a festival in St. Petersburg, branding it “Satanist,” as part of a larger assault on anything viewed as a Western influence.

© Andrei Bok/SOPA Images, via Getty Images

The state’s governor had called for a pause in the federal immigration crackdown over the Halloween weekend, citing concerns for children’s safety.

President Trump, who did not wear a costume, and the first lady handed out candy at the annual Halloween celebration at the White House.

© Anna Rose Layden for The New York Times

As climate change has helped push cocoa prices higher, companies are changing candy recipes in subtle ways.

© Alamy