Wikipedia:Selected anniversaries/March 30
- 1867 - U.S. Secretary of State William H. Seward negotiated the purchase of Alaska from Russia.
- 1912 - Sultan Abdelhafid signed the Treaty of Fez, making Morocco a French protectorate.
- 1940 - World War II: Wang Jingwei was installed by Japan as head of the puppet government in China.
- 1954 - The Toronto Transit Commission launched the first subway system in Canada.
- 1964 - Merv Griffin's game show Jeopardy! made its debut on television.