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- Rata Die (R.D.) is a system for assigning numbers to calendar days (optionally with time of day), independent of any calendar, for the purposes of calendrical calculations. It was named (after the Latin ablative feminine singular for "from a fixed date") by Howard Jacobson. Rata Die is somewhat similar to Julian Dates (JD), in that the values are plain real numbers that increase by 1 each day. The systems differ principally in that JD takes on a particular value at a particular absolute time, and is the same in all contexts, whereas R.D. values may be relative to time zone, depending on the implementation. This makes R.D. more suitable for work on calendar dates, whereas JD is more suitable for work on time per se. The systems also differ trivially by having different epochs: R.D. is 1 at midnight (00:00) local time on January 1, AD 1 in the proleptic Gregorian calendar, JD is 0 at noon (12:00) Universal Time on January 1, 4713 BC in the proleptic Julian calendar. (en)
- Rata Die (c лат. — в подсчитанный день) — число дней, прошедших с начала нашей эры по продлённому в прошлое григорианскому календарю. Rata Die = 1 соответствует 1 января 1 года нашей эры (01.01.0001). (ru)
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- 3476 (xsd:nonNegativeInteger)
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- Rata Die (c лат. — в подсчитанный день) — число дней, прошедших с начала нашей эры по продлённому в прошлое григорианскому календарю. Rata Die = 1 соответствует 1 января 1 года нашей эры (01.01.0001). (ru)
- Rata Die (R.D.) is a system for assigning numbers to calendar days (optionally with time of day), independent of any calendar, for the purposes of calendrical calculations. It was named (after the Latin ablative feminine singular for "from a fixed date") by Howard Jacobson. (en)
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- Rata Die (en)
- Rata Die (ru)
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