observance
//əbˈzɜːvəns//
Noun
observanceSingular
observancesPlural
1
The practice of following or obeying a law, custom, rule, or religious ritual.
The observance of traffic rules is essential for public safety.
2
A ceremony or celebration, especially a religious one.
The church held a special observance to mark the anniversary of its founding.
3
The act of watching or noticing something carefully.
The scientist's careful observance of the experiment led to an important discovery.