misobservance

Etymology

From mis- + observance.

misobservance means an instance or the practice of not complying with a law, custom, command or rule, or doing so wrongly. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

An instance or the practice of not complying with a law, custom, command or rule, or doing so wrongly.“This represents a deliberate misobservance of the rule which permits only one underlying cause to be entered in Part 1.”
The custom of not celebrating a holiday or similar occasion.