“Dimanchophobia:
Fear of Sundays, not in a religious sense but rather, a condition that reflects fear of unstructured time. Also known as acalendrical anxiety. Not to be confused with didominicaphobia, or kyriakephobia, fear of the Lord's Day.
Dimanchophobia is a mental condition created by modernism and industrialism. Dimanchophobes particularly dislike the period between Christmas and New Year's, when days of the week lose their significance and time blurs into a perpetual Sunday. Another way of expressing dimanchophobia might be "life in a world without calendars." A popular expression of this condition can be found in the pop song "Every Day is Like Sunday," by Morrissey, in which he describes walking on a beach after a nuclear way, when every day of the week now feels like Sunday.”
Douglas Coupland