quindecennial = 473353889.63184 second (time)
Try converting from "quindecennial" to autumn, calendar yr (calendar year), century, day, fiscal yr (fiscal year), leap yr (leap year), millenium, minute, octennial, pregnancy, quinquennial, s (second), sidereal day, sidereal month, spring, summer, week, weekend, winter, yr (year), or any combination of units which equate to "time" and represent time.
quindecennial = 61.1 autumn, .15 century, 5,478.63 day, 1.5 decade, 391.33 fortnight, 14.97 leap yr (leap year), .015 millenium, 7,889,231.49 minute, 1.67 novennial, 1.88 octennial, 3 quinquennial, 2.14 septennial, 5,493.63 sidereal day, 200.52 sidereal month, 15 sidereal yr (sidereal year), 58.57 summer, 185.52 synodic month, 2,739.32 weekend, 61.53 winter, 15 yr (year).
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