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The age of Yisrael Kristal when he celebrated his bar mitzvah in 2016. The Holocaust survivor had been unable to have his coming-of-age ceremony aged 13 in 1916, during World War I.
LONG ANSWER On 1 January 1901, the six self-governing colonies of Australia united to form a federation, the Commonwealth of Australia, marking a landmark moment in the fight for independence from British rule. It had been a long time coming, and was not the end either.