I'd like to suggest an Ides of March run - a speedrun to kill Caesar with a knife as soon as possible (thus getting the Historical Propriety achievement, I think is the one).

Requirements would be:

• Kill Caesar with a knife (any knife, including knife, combat knife, bowie knife, or cleaver)
• Acquire the Historical Propriety achievement
• Must be performed on March 15, either in game or in reality

As one of the few games with both Caesar as a killable character and with knives, I think we owe it to ourselves.