observance

Noun

• conformity with law or custom or practice etc.

• the act of noticing or paying attention
  • he escaped the notice of the police
    

• a formal event performed on a special occasion
  • a ceremony commemorating Pearl Harbor
    

• the act of observing; taking a patient look

Related words

• Synonyms: 
  honoring , notice , observation , ceremony , ceremonial , ceremonial occasion , watching