The Quaternary Period, the Cenozoic Era geologic time unit from the end of the Pliocene Epoch, roughly 1.8−1.6 million years ago, to the present day. The Quaternary has 2 geologic/geochronologic subdivisions, the Pleistocene and the Holocene Epochs.

This category contains events which happened in the Quaternary, a division of the geologic time scale. See geologic time scale for information about its divisions and how they relate to each other.