2015 Event North Korea reverts its time zone to that used prior to Japanese colonialization in 1910 in order to commemorate 70 years of liberation from the �wicked Japanese imperialists� 2012 Event In New Zealand's city of Christchurch, thousands of people commemorate the first anniversary of the earthquake where 185 people died last year 2012 Event In Egypt, protesters commemorate the first anniversary of the revolution 2011 Event Memorial ceremonies are held worldwide to commemorate the 10th anniversary of the September 11th attacks 1804 Event Palver Purim 1st celebrated to commemorate miraculous escape 1147 Event Jewish community in Cologne fast to commemorate anti-Jewish violence