I've had a tango mandarin planted for four years now -- it's the most lush of my citrus trees and puts out lots of lovely flowers each spring, but the fruit always immediately drops. With the cooler temps we had in May, I have several flowers appear late in the season, and I just noticed that I have two good-sized mandarins on it -- I'm so excited! When do mandarins ripen in Phoenix -- is there a chance I'll actually get fruit this year?
Pretty good chance you will get to welcome in the new year with a Tango.
Citrus is a (the) winter fruit.
Depending upon your microclimate and the vagaries of each year Tango may be edible around the beginning of Dec. But they will likely reach their peak in Jan-Feb. And be good on the tree through March.