Formula for converting to julian dating

27-May-2020 08:03

formula for converting to julian dating-37

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The fraction of the day is found by converting the number of hours, minutes, and seconds after noon into the equivalent decimal fraction.

The term Julian date is also used to refer to: The use of Julian date to refer to the day-of-year (ordinal date) is usually considered to be incorrect although it is widely used that way in the earth sciences, computer programming, military and the food industry.

Computers were built to do math really really fast so whenever possible I’ll use math to do my date conversions.The term Julian date is widely used to refer to the day-of-year (ordinal date) although incorrectly.Historical Julian dates were recorded relative to GMT or Ephemeris Time, but the International Astronomical Union now recommends that Julian Dates be specified in Terrestrial Time, and that when necessary to specify Julian Dates using a different time scale, that the time scale used be indicated when required, such as JD(UT1).We can completely avoid the string conversion and need for RIGHT() by using some math.

The modulo operator % is a math function that returns the remainder for a whole number. We can use this to return the right-most N digits from a number without needing to do any string manipulation by using [number] % 10^N.

I regularly use this technique to build my own bins, for example INT([Sales] / 100) * 100 creates bins of 0, 100, 200, and so on.

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