Liberation

The Liberation, also known as L-Day or the Uprising, is the date on which the Universal Union's control over Eurasia was fractured.

Definition
Historians dispute over the exact date of the Liberation. The predominant view dates the Liberation on September 19th, 2022 AD, when the City 17 Citadel was raided by Gordon Freeman. This is the date used as the epoch of the Olegian calender and for L-Day celebrations. However, numerous institutions in Federated America assert that the date falls on August 23rd, when a large section of City 16 was overtaken by rioters in an uprising. The TPC of Free Russochina declared the national date of Liberation to be August 31st.