The title literally means "Heavens, it's my Tuesday!"
but is also a wordplay on the more common Ciel, mon mari!
", which would have been uttered by a woman caught with another man by her husband.
Dechavanne invited groups of people who hated each other in real life to let them "discuss" their differences.
For example, he would invite priests and homosexuals, Jewish groups and neo-Nazis, etc.