misobservance

mis- +‎ observance

misobservance (plural misobservances)

1. The instance or practice of not complying with a law, custom, command or rule.
   • 2006, Werner U. Spitz, ‎Daniel J. Spitz, Spitz and Fisher's Medicolegal Investigation of Death: Guidelines for the ...

     This represents a deliberate misobservance of the rule which permits only one underlying cause to be entered in Part 1.

2. The custom of not celebrating a holiday or similar occasion.

• observance