septennial = 220898481.828192 second (time)
Try converting from "septennial" to calendar yr (calendar year), century, day, decade, fiscal yr (fiscal year), fortnight, leap yr (leap year), minute, month, octennial, pregnancy, quindecennial, quinquennial, s (second), sidereal yr (sidereal year), spring, week, weekend, winter, yr (year), or any combination of units which equate to "time" and represent time.
septennial = 28.51 autumn, .07 century, 2,556.7 day, .7 decade, 7.1 fiscal yr (fiscal year), 182.62 fortnight, 6.99 leap yr (leap year), .007 millenium, 84 month, .77777778 novennial, 1.75 olympiad, 9.33 pregnancy, .46666667 quindecennial, 1.4 quinquennial, 220,898,481.83 s (second), 2,563.7 sidereal day, 27.5 spring, 27.33 summer, 86.58 synodic month, 7 yr (year).
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