Search the Community

There used to be a Kerbal Calendar mod. I don't know just what it used as its periods. As per the wiki: The Kerbal Calendar (The Kalendar) A Kerbin year is 426 days long. More accurately, it's 426 days, 32 minutes, 24.6 seconds long. (9203544.6 s) The Mun orbits Kerbin every 6 days, 2 hours, 36 minutes, 24.4 seconds. (138984.4 s) (Remember for these that a Kerbin day is 6 hours long.) Kerbals don't have weeks, as they would be less than 2 days long each (an Earth week is ideally one Moon phase, though of course it isn't, quite). There are 66 (66.22) Munar cycles every year (a month is ideally a Lunar cycle). A Kerbin munth is 6 days long. Or 7. In an 11-munth cycle, the length of Kerbin munths would be 6, 7, 6, 7, 6, 7, 6, 7, 6, 7, 6, repeating six times through the year, for 426 days, tracking the Mun as accurately as division into days allows. (Note: starting from 0, the first munth would be the 6 from the end of the last cycle, but this can be satisfied by starting the first-ever cycle 1 munth early.) For want of a better term, this would create 6 Kerbin seasons of 71 days each. There are no seasonal differences as we know them, due to the 0-degree inclination and axial tilt, and the perfectly circular orbit of the planet. We can theorize that these are the primary divisions of the year, akin to our months, with munths being similar to weeks. Leap Day Earth leap years are every four years, except for years divisible by 100 and not divisible by 400. (This will change slightly in about 784 years.) There are 1944.6 extra seconds, or 32.41 minutes, in each Kerbin year. 12 of these would be slightly more than a day, by 28.92 minutes. Since you never want to have a second Leap Day in a year, and it would happen fairly often, the kalendar would be amended with an extra day every 11 years, neatly echoing the 11-munth seasons. Now there is an extra 0.1 day being added every 110 years. 426 * 110+10 = 46870 426.09 * 110 = 46869.9 So every 1,100th year would skip this Leap Day. There is a small remainder to be dealt with still (numbers were rounded here), but that can be left for Jeb the 11000th to work out. Alternately, some kerbals prefer leap munths.... Unfortunately, I don't think the current time tracking in the game accounts for the leap day. Maybe it needs a mod.