Hitler considered Hess' departure a personal betrayal, and ordered Hess to be shot should he return to Germany and abolished the post of Deputy Führer on 12 May 1941, assigning Hess' former duties to Bormann, with the title of Head of the Parteikanzlei (Party Chancellery). In this position he was responsible for all NSDAP appointments, and was answerable only to Hitler. Associates began to refer to him as the "Brown Eminence", although never to his face.
The Second Battle of Kharkov or Operation Fredericus was a successful Axis counter-offensive in the region around Kharkov. Operation Fredericus took place from 12 to 28 May 1942. The battle was an overwhelming German victory.
Six months after the Khasav-Yurt Accord, on 12 May 1997, Chechen-elected president Aslan Maskhadov traveled to Moscow where he and Yeltsin signed a formal treaty "on peace and the principles of Russian-Chechen relations" that Maskhadov predicted would demolish "any basis to create ill-feelings between Moscow and Grozny".
Barnes & Noble sued Amazon on May 12, 1997, alleging that Amazon's claim to be "the world's largest bookstore" was false because it "...isn't a bookstore at all. It's a book broker." The suit was later settled out of court and Amazon continued to make the same claim.
On 12 May 2010, when May was appointed Home Secretary and Minister for Women and Equality by Prime Minister David Cameron as part of his first Cabinet, she became the fourth woman to hold one of the British Great Offices of State, after Margaret Thatcher (Prime Minister), Margaret Beckett (Foreign Secretary) and Jacqui Smith (Home Secretary).
On 12 May 2010, Turkey and Russia signed 17 agreements to enhance cooperation in energy and other fields, including pacts to build Turkey's first nuclear power plant and further plans for an oil pipeline from the Black Sea to the Mediterranean Sea. The leaders of both countries also signed an agreement on visa-free travel, enabling tourists to get into the country for free and stay there for up to 30 days.
On 12 May, Francis carried out his first canonizations of candidates approved for sainthood during the reign of Benedict XVI: the first Colombian saint, Laura of Saint Catherine of Siena, the second female Mexican saint, Maria Guadalupe Garcia Zavala, both of the 20th century, and the 813 15th-century Martyrs of Otranto.
Mother's Day in Canada is celebrated on the second Sunday in May (it is not a public holiday or bank holiday), and typically involves small celebrations and gift-giving to one's mother, grandmother, or other important female figures in one's family. Celebratory practices are very similar to those of other western nations. A Québécois tradition is for Québécois men to offer roses or other flowers to the women.