Version 1507, Threshold 1, was released on 07/29/2015.
Version 1511, Threshold 2, was released on 11/29/2015.
Version 1607, Redstone 1, is also called [Anniversary Update], that was released on 8/2/2016.
Version 1703, Redstone 2, is also called [Creator Update], was released on 04/05/2017.
Version 1709, Redstone 3, was released on 10/17/2017.
Version 1803, Redstone 4, was released on 04/30/2018.
Version 1809, Redstone 5, was released on 11/13/2018.
Version 1903, 19H1, was released on 05/21/2019.
Version 1909, 19H2, was released on 11/12/2019.
Version 2004, 20H1, was released on 05/27/2020.
Version 20H2, 20H2, is not released yet.