What is the ruling on studying all day long and missing prayer times, knowing that this study is to obtain another certificate for the purpose of working as a nurse?

Prayer is the pillar of faith and the greatest pillar after the Two Testimonies. Allah has begun and concluded with it the good deeds that necessitate entry into Paradise, and He has threatened those who neglect it with the severest of warnings. It is authentically reported from the Prophet, peace and blessings of Allah be upon him, that whoever observes prayer, it will be a light, a proof, and salvation for him on the Day of Resurrection. As for whoever does not observe it, he will be resurrected with Pharaoh, Haman, Qarun, and Ubayy ibn Khalaf. Prayer is a timed scripture, and it is not permissible to perform it outside its time except out of necessity for combining two prayers, and studying is not an excuse for that.