What is the answer in this riddle it's not heaven but has days and months it stops but then right away resumes grows older but stays always a year in age it life's end is celebrated with fun and homag?

The answer to the riddle is a calendar. A calendar has days and months, stops to reset each year, and gets older but remains the same age in years. Its end (December 31st) is celebrated as New Year's Eve with fun and homage.