The Outreach and Press Unit (UC3) of the Instituto de Astrofísica de Canarias (IAC), with the collaboration of Álex Oscoz Abad and the IAC Astrophotography Group ( research.iac.es/OOCC/refractor ) , has published as in previous years an astronomical wall calendar with astronomical ephemeris for the year 2021, which can be consulted and downloaded in digital format. The images that illustrate it have been obtained by Pedro A. González Morales and Jorge A. Pérez Prieto. This calendar joins another published in poster format illustrated with the image of the Heart Nebula. Both calendars can be

The Instituto de Astrofísica de Canarias (IAC), in collaboration with the Museum of Science and the Cosmos (MCC) of Museums of Tenerife, and the Gran Telescopio Canarias (GTC) has published, as it does every year, a calendar with important astronomical dates for the year 2020, in the format of a poster or a wall calendar (see the gallery). The picture which illustrates it is a photograph of the GTC at dawn, in the Roque de los Muchachos Observatory (Garafía, La Palma), taken by the astrophotographer Daniél López. Free copies of the calendar, on paper in poster format can be obtained from