- January 25, 1777
There has been a Lord Lieutenant of Buckinghamshire almost continuously since the position was created by King Henry VIII in 1535. The only exception to this was the English Civil War and English Interregnum between 1643 and 1660 when there was no king to support the Lieutenancy.
Since 1702, all Lord Lieutenants have also been Custos Rotulorum of Buckinghamshire.
25 January 1777 – John Hobart, 2nd Earl of Buckinghamshire, is sworn in as Lord Lieutenant of Ireland. 19 February – the Langrishe Baronetcy, of Knocktopher Abbey in the County of Kilkenny, is created in the Baronetage of Ireland for Hercules Langrishe, Member of Parliament for Knocktopher in the Irish House of Commons.