A noteworthy occasion is an EVENT that is considered to be particularly significant or memorable. It could be a celebration, a gathering, or any other type of activity that is deemed to be important. The term 'noteworthy occasion' can be used to describe a variety of different events, such as weddings, anniversaries, graduations, and other special occasions. The crossword solution for the term 'noteworthy occasion' is 'EVENT, ' which is a five-letter word that describes any kind of activity or gathering.