
Students and their teacher participate in a Maslenitsa celebration in central Moscow, Russia, on Feb. 27, 2020. Maslenitsa is a traditional Russian holiday to celebrate the beginning of spring. (Photo by Maxim Chernavsky/Xinhua)

Students participate in a Maslenitsa celebration in central Moscow, Russia, on Feb. 27, 2020. Maslenitsa is a traditional Russian holiday to celebrate the beginning of spring. (Photo by Maxim Chernavsky/Xinhua)

Students participate in a Maslenitsa celebration in central Moscow, Russia, on Feb. 27, 2020. Maslenitsa is a traditional Russian holiday to celebrate the beginning of spring. (Photo by Maxim Chernavsky/Xinhua)

Students and their teacher participate in a Maslenitsa celebration in central Moscow, Russia, on Feb. 27, 2020. Maslenitsa is a traditional Russian holiday to celebrate the beginning of spring. (Photo by Maxim Chernavsky/Xinhua)

Students and their teacher participate in a Maslenitsa celebration in central Moscow, Russia, on Feb. 27, 2020. Maslenitsa is a traditional Russian holiday to celebrate the beginning of spring. (Photo by Maxim Chernavsky/Xinhua)

Students participate in a Maslenitsa celebration in central Moscow, Russia, on Feb. 27, 2020. Maslenitsa is a traditional Russian holiday to celebrate the beginning of spring. (Photo by Maxim Chernavsky/Xinhua)