Births on May 21

Robert Welch, English silversmith and industrial designer (d. 2000)

Robert Radford Welch MBE, RDI (21 May 1929 – 15 March 2000), was an English designer and silversmith.

31 Jan

Leon Trotsky
The Soviet Union exiles Leon Trotsky.
26 Feb

Grand Teton National Park
President Calvin Coolidge signs an executive order establishing the 96,000 acre Grand Teton National Park in Wyoming.
8 Apr

Bhagat Singh
Indian independence movement: At the Delhi Central Assembly, Bhagat Singh and Batukeshwar Dutt throw handouts and bombs to court arrest.
21 Jun

Cristero War
An agreement brokered by U.S. Ambassador Dwight Whitney Morrow ends the Cristero War in Mexico.
23 Aug

1929 Palestine riots
Hebron Massacre during the 1929 Palestine riots: Arab attack on the Jewish community in Hebron in the British Mandate of Palestine, continuing until the next day, resulted in the death of 65-68 Jews and the remaining Jews being forced to leave the city.