fear of dawn
<psychology> Morbid dread of the dawn. ... Origin: G. Eos, dawn, + phobos, fear ... (05 Mar 2000) ... 
Type: Term Pronunciation: ē′ō-sō-fō′bē-ă Definitions: 1. Morbid dread of the dawn.
Eosophobia is the fear of dawn.
eosophobia An abnormal fear of the dawn; a depression caused by a fear of the dawn; in some cases, because some people are afraid of being seen by others.