|Event type||United Empire of Earth holiday|
|Location||United Empire of Earth|
|Date||July 12, Annually|
Imperator's Day was established as a holiday in 2380, originally under the name Council Day to recognize the initial council of the United Nations of Earth (UNE). In 2523 the United Planets of Earth (UPE) was founded and the holiday was renamed Tribunal Day. In 2546 Ivar Messer I established the UEE and once again the holiday was renamed, this time to the current form, Imperator's Day.
Imperator's Day commemorates humanity coming together as one. Is modern times the holiday is a moment remember all humanity has achieved working together and to focus on acceptance, inclusion, and mutual understanding.