May 12 is the 132nd day (133rd day of a leap year) in the Gregorian calendar.
1551 – The National University of San Marcos, the oldest university in South America, is founded in Lima, Peru.
1938 - Launch of USS Enterprise (CV-6)
1941 – German engineer Konrad Zuse displays the Z3, the first programmable automatic computer, in Berlin.
1989 – The Legal Entity of Jehovah's Witnesses in Poland is formed under the name "Towarzystwo Biblijne i Traktatowe – Zarejestrowany Związek Wyznania wiadków Jehowy".
1998 – The Trisakti Tragedy, in which 4 Trisakti University students died after being shot by security forces during a demonstration in front of the Trisakti campus which eventually sparked the May 1998 Riots.
2008 – The Wenchuan earthquake (about 8.0 on the Richter scale) occurs in Sichuan, killing more than 69,000 people.
2008 - Beginning of the implementation of the SD/MI National Examination for the 2007/2008 academic year in Indonesia.
2016 - The end of the implementation of the SMP/MTs National Examination for the 2015/2016 academic year in Indonesia.
1820 - Florence Nightingale (d. 1910)
1982 - Maman Abdurrahman, Former Indonesian National Football Team Player
1987 - Rory Asyari, artist and former news anchor for Metro TV
1990 - Di Muhammad Devirzha, Indonesian singer
Holidays and anniversaries
1974 - International Nurses Day
1979 - Vesak 2523 BE
1983 - Ascension of Jesus Christ
1988 - Ascension of Jesus Christ
1994 - Ascension of Jesus Christ May 11 - May 12 - May 13