The 2017B Spanish night CAT call for proposals for the Canarian Observatories is now available and proposals are due on April 3rd, at 17 h Canarian time (18 h CET). The Gran Telescopio de Canarias (GTC) Spanish-Mexican collaborative time call for proposals is also open with the same due date. There are important changes with respect to previous calls for proposals. The new highlights are available on https://ocan.iac.es/call-for-proposals-semester-2017b/.