DESI: Early Data Release and project update

The Dark Energy Spectroscopic Instrument (DESI) is an on-going Stage IV experiment, which will map the Universe up to z=3.5 with 40 million redshift measurements. I will present the content of the Early Data Release (EDR), the current status of the instrument and of the Main Survey. The EDR contains more than one million redshifts taken from Dec. 2020 to May 2021., which have been used to finalize and validate the Main Survey design. The Main Survey started in May 2021, and has already gathered more than 20 million redshifts. I will present the various performed data-quality assessments, which ensures that the provided redshifts can be used for the DESI science.