septennial = 220898481.828192 second (time)
Try converting from "septennial" to autumn, calendar yr (calendar year), century, day, decade, fiscal yr (fiscal year), leap yr (leap year), millenium, minute, month, novennial, octennial, olympiad, pregnancy, sidereal day, sidereal yr (sidereal year), spring, week, winter, yr (year), or any combination of units which equate to "time" and represent time.
septennial = 7 calendar yr (calendar year), .07 century, 2,556.7 day, .7 decade, 182.62 fortnight, 6.99 leap yr (leap year), .007 millenium, 3,681,641.36 minute, .77777778 novennial, .875 octennial, 9.33 pregnancy, 1.4 quinquennial, 220,898,481.83 s (second), 2,563.7 sidereal day, 93.58 sidereal month, 7 sidereal yr (sidereal year), 27.33 summer, 86.58 synodic month, 28.71 winter, 7 yr (year).
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