septennial = 220898481.828192 second
Try converting from "septennial" to calendar yr (calendar year), century, day, fiscal yr (fiscal year), hour, leap yr (leap year), millenium, novennial, octennial, olympiad, pregnancy, quinquennial, s (second), sidereal day, sidereal yr (sidereal year), spring, synodic month, week, weekend, yr (year), or any combination of units which equate to "time" and represent time.
septennial = 28.51 autumn, 2,556.7 day, 7.1 fiscal yr (fiscal year), 182.62 fortnight, 61,360.69 hour, .007 millenium, 3,681,641.36 minute, 84 month, .77777778 novennial, .875 octennial, .46666667 quindecennial, 1.4 quinquennial, 220,898,481.83 s (second), 2,563.7 sidereal day, 7 sidereal yr (sidereal year), 27.5 spring, 27.33 summer, 86.58 synodic month, 365.24 week, 7 yr (year).
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