The term ONE OF 12 is referring to one of the twelve months in a year. The crossword solutions for this term are APRIL and MONTH. APRIL is the fourth MONTH of the year in the Gregorian calendar, which is used in most countries around the world. It is typically associated with the season of spring and is known for its showers of rain. MONTH is a unit of time that is typically divided into four weeks and is used to measure the passage of time.