Editing 1930 (section)

===December===
{{Main|December 1930}}
* [[December]] – All adult [[Turkey|Turkish]] women are given the right to vote in elections.
* [[December 19]] – [[Mount Merapi]] volcano in central [[Java]], [[Indonesia]], erupts, destroying numerous villages and killing 1,300 people.
* [[December 24]] – In London, inventor [[Harry Grindell Matthews]] demonstrates his device to project pictures on clouds.
* [[December 29]] – Sir [[Muhammad Iqbal]]'s [[Allahabad Address|presidential address in Allahabad]] introduces the [[two-nation theory]], outlining a vision for the creation of [[Pakistan]].<ref>{{citation |last=Wolpert |first=Stanley A. |title=Jinnah of Pakistan |url=https://books.google.com/books?id=d0PqPAAACAAJ |date=12 July 2005 |publisher=Oxford University Press |isbn=978-0-19-567859-8|pages=47–48}}</ref>
* [[December 31]] – The [[Papal encyclical]] ''[[Casti connubii]]'', issued by [[Pope Pius XI]], stresses the sanctity of marriage, prohibits [[Catholic Church|Roman Catholic]]s from using any form of artificial [[birth control]], and reaffirms the Catholic prohibition on [[abortion]].