We have two short talks for you.  Noel will talking about Cecilia Payne-Gaposchkin and one of the most important discoveries in the history of astronomy. The second will be Mark with a short history of the Calendar.

Image: By Smithsonian Institution/Science Service, restored by Adam Cuerden – Air and Space Museum online gallery, Public Domain, https://commons.wikimedia.org/w/index.php?curid=140704011