Fifty Years of the Skumanich Relations

In February 1972, the Astrophysical Journal published "Time Scales for Ca II Emission Decay, Rotational Braking, and Lithium Depletion" by Dr. Andrew Skumanich, a research scientist at the High Altitude Observatory (HAO) in Boulder, Colorado. The paper is one of the most impactful publications in the history of HAO, with more than 1500 citations to date. To celebrate the 50th anniversary of this publication, we will host an in-person conference on 8‑11 March 2022, organized around the major science themes of the paper: magnetic activity, stellar rotation, and lithium depletion.