Template:Selected anniversaries/December 30
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1122: Omar Khayyam invents new class of Gnomon algorithm equations.
1722: Bond, issued by Dutch East India Company in 1623, converted to transdimensional corporation.
1842: Osman Hamdi Bey born. He will be an administrator, intellectual, art expert, painter, and archaeologist.
1954: Tunguska Event Preservation Society pledge drive day.
2013: Egg Tooth Neighborhood Association votes against transdimensional corporation status.