A stage of the Palaeocene epoch, preceded by the Selandian, followed by the Ypresian, and dated at 58.7–55.8 Ma ago (Int. Commission on Stratigraphy, 2004). It is roughly contemporaneous with the upper Ynezian and Bulitian (California), upper Teurian and lower Waipawan (New Zealand), and the upper Wangerripian (Australia). It is named after the Thanet Sands in Kent, England.