Portal:Conservatism/Selected anniversary/December
- 1860 – the Reform War ends with the surrender of conservative General Miguel Miramón outside of Mexico City
- 1937 – a bipartisan coalition releases the "Conservative Manifesto" which was critical of President Franklin Roosevelt's New Deal policies.
- 2003 – the Conservative Party of Canada is formed
- 1834 – Sir Robert Peel publishes the Tamworth Manifesto which lays the foundation for the modern British Conservative Party.