You searched for: “eophobia
eophobia, eosophobia (s) (noun) (no plural)
An extreme fear of the dawn: After having spent many years in a very dark cell in prison, the inmate had euphobia, a horror of daylight and the sun rising!

In some cases eosophobia can cause a depression in a person because he or she wants to continue to sleep and not get up and face the activities of the day!