On 30 January 1933, President Paul von Hindenburg appointed Hitler as Chancellor of Germany. This event is known as the Machtergreifung (seizure of power). In the following months, the Nazi Party used a process termed Gleichschaltung (co-ordination) to rapidly bring all aspects of life under control of the party.The “seizure of power” (also known as the assumption of power or transfer of power) refers to the transfer of government power in the German Reich on January 30, 1933 to the NSDAP and its national-conservative allies (DNVP, Stahlhelm) as well as the subsequent transformation of the Weimar Republic’s democracy into the dictatorship of National Socialist Germany. As the first two terms are not considered neutral or precise for various reasons, historians also use the terms transfer of power or transfer of power and describe the events as a whole as the phase of the National Socialist seizure of power in 1933/34. The National Socialists celebrated the day of the national uprising on January 30 as the beginning of their seizure of power. On this day in 1933, Adolf Hitler was sworn in as Reich Chancellor by Reich President Paul von Hindenburg and tasked with forming a coalition government of the National Union, in which the National Socialists were in the minority.
Cf. https://en.wikipedia.org/wiki/Nazi_Germany (Accessed: June 13, 2025)
https://de.wikipedia.org/wiki/Machtergreifung (Accessed: June 13, 2025)