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| Malatoran Calendar; The official FedCom calendar system | |
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| Topic Started: 7 Feb 2008, 07:41 PM (884 Views) | |
| Tigerstripe | 7 Feb 2008, 07:41 PM Post #1 |
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keeping busy
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Currently, the official calendar for FedCom is a variation of the World Calendar. It is meant to fix several inadequacies that remain in the commonly used Gregorian calendar. Notable improvements over the Gregorian calendar:
Below is the format of the calendar: Posted Image X = Leap year holiday (outside of week cycle, only on leap years) W = End of year / new year holiday (outside of week cycle, every year) Note that these two extra days are not connected to the week cycle. In practice, the calendar pauses to "catch up" to the solar year, since the actual solar year cannot easily be divided evenly. 7-day weeks are retained out of respect for worldwide traditions and religions. The perpetual nature of this calendar makes the need to calculate difficult religious holidays (such as Easter) obsolete, since the same day always arrives at the same date, regardless of the year. Leap years: Leap years are calculated in very much the same manner as they are in the Gregorian calendar: every year divisible by 4, except those divisible by 100, but including those divisible by 400. This would yield an accuracy loss of one day per 3,300 years (same as the Gregorian calendar). However, our calendar's accuracy is further improved by the addition of one more leap year rule: there is no leap year on years divisible by 4,000. This 4,000-year cycle reduces the average year length to 365.24225 days (compared to the Gregorian 365.2425 days), and more than doubles the effective accuracy of the calendar. For reference, a day is not the same length regardless of your location on the planet. The mean tropical year is 365.24219 days, but the vernal equinox year is 365.24237 days. Perfect accuracy with a mathematical calculator is not currently possible on Earth, because the timescale is so vast, and the rotation of the planet is gradually slowing over the course of millions of years (about one full second every decade). This is caused by continuous gravity interactions between the planet and the Sun, the Earth gaining mass from colliding space dust, and by tidal forces causing friction and inertia in our oceans. Leap years delay the onset of errors, but they cannot completely eliminate them. Epoch: This calendar uses the dawn of the Space Age (the launch of the first artificial satellite: Sputnik) as its epoch. Thus, the year 1957 A.D. on the Gregorian system corresponds to the year "0 S.E." on this calendar. Like earlier calendars, the year suffix indicates how the years are related to this history-changing event. Dates are identified as belonging to either the Terrestrial Era (T.E.) or the Space Era (S.E.). Space Era dates count forward from the year Sputnik was launched, while earlier dates count backwards. Remember: unlike the Gregorian calendar, this system has a true "zero year", so "1 T.E." is not followed by "1 S.E." — it's followed by "0 S.E." Year and Date conversions from Gregorian: To convert a Gregorian year into its FedCom equivalent:
In the case of important historical events, it may be desirable to create a precision conversion. For greater accuracy, you first need to establish a precise date in the Gregorian calendar (which can be difficult for dates earlier than October 15, 1582; the first day the Gregorian Calendar went into effect). Once you have a precise date, you can transform it to fit the new calendar with a little logic and some math. Consider the differences in month structure, especially at the transition from February to March. In our new calendar, this occurs one or two days after the Gregorian calendar changes, which creates an offset, depending on whether it is leap year or not. As a result of February having 30 days, and no longer being modified during a leap year, March can be offset as much as two days during standard years, or one day during a leap year. This effect is minimized at the end of the month, since March has 31 days in the Gregorian calendar, but only 30 in ours. Because our leap years do not coincide with Gregorian Leap Years (because our Epoch falls on a odd year in the Gregorian calendar, rather than an even one; and we have the 4000-year leap cycle to boost accuracy), we have an additional factor to consider. For us, a leap year usually follows the Gregorian leap year (see leap year calculations, above). Thus, we have three conversion tables to work with. Which one is appropriate depends on whether it's a standard year in both calendars, a Gregorian leap year, or a Malatoran leap year. |
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| Tigerstripe | 29 Apr 2009, 10:59 PM Post #2 |
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keeping busy
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(post too long... tables continued below) |
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| Tigerstripe | 29 Apr 2009, 11:25 PM Post #3 |
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keeping busy
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Note that these tables only give you the exact Malatoran date that corresponds to any particular Gregorian date. To find the day of the week for any Malatoran date, simply look at the calendar at the top of this topic. Finding the Gregorian day of the week for any particular date is a massive headache, so I'm not going to even go there... |
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7:38 PM Jul 11