What day of the week was May 15, 1891?

The day of the week May 15th, 1891 fell on was a Friday.

Mikhail Bulgakov the Russian author and playwright (d. 1940) was born on 15 May in 1891. As was Fritz Feigl the Austrian-Brazilian chemist and academic (d. 1971) .

Pope Leo XIII defends workers' rights and property rights in the encyclical Rerum Novarum the the beginning of modern Catholic social teaching.