The Epiphany Rising was a failed rebellion against Henry IV of England in late December 1399 and early January 1400.
Richard II rewarded those who had supported him against Gloucester and the Lords Appellant with a plethora of new titles. Upon the usurpation and accession of King Henry IV in 1399, many of those titles were placed under attainder, due to the complicity of their holders in the murder of the .
The ringleaders of the conspiracy were John Montagu, 3rd Earl of Salisbury, John Holland, 1st Earl of Huntingdon (formerly Duke of Exeter) and half-brother to Richard II, Thomas Holland, 3rd Earl of Kent (formerly Duke of Surrey), and Thomas le Despenser, 4th Baron le Despencer (formerly Earl of Gloucester). Other members included Edward of Norwich, 1st Earl of Rutland (formerly Duke of Aumale), Ralph Lumley, 1st Baron Lumley, Sir Thomas Blount and Sir Bernard Brocas. They met on 17 December 1399 at the Abbey house in Westminster and plotted to capture the new King Henry IV while he was at Windsor for the feast of Epiphany.
They hoped to seize the king during a tournament, kill him, and restore Richard II to the throne. However, Edward of Norwich betrayed the conspirators to King Henry, although according to Tait, contemporary English sources which describe the conspiracy make no mention of Rutland, and his role in it is open to doubt. Nevertheless, forewarned, Henry failed to appear at Windsor and began to raise an army in London. Kent and Salisbury arrived at the castle with a force of about 400 men-at-arms and archers, but hearing that the king, forewarned, was no longer there, quickly left.