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JDToDate ( JulianDayNumber ; gregorian )

converts a Julian Day number into a Filemaker date

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Theo Ros - Show more from this author

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/* ---------------------------------------------------------- Converts a Julian Daynumber into a FileMaker date a JD number is based on November 24 -4713 (=day zero Gregorian) which is January 1 -4712 (January 1 4713 BC) Julian. In: JulianDayNumber - a Julian Daynumber gregorian - optional: if <> 0 or empty use Gregorian calendar if 0 use Julian calendar defaults to Gregorian calendar Return type: Date Syntax: JDToDate ( jd ; 1 ) Return type: Date (numbers in formula written with decimal COMMA's) JDToDate ( 2453521 ) returns a date May 30, 2005 Author - Theo Ros ----------------------------------------------------------*/ Let ( [ temp = Int ( JulianDayNumber ) ; a = If ( IsEmpty ( gregorian ) or gregorian <> 0 ; Int ( ( temp / 36524,25 ) - 51,12264 ) ; 0 ) ; b = If ( IsEmpty ( gregorian ) or gregorian <> 0 ; temp + 1 + a - Int ( a / 4 ) ; temp ) ; c = b + 1524 ; e = Int ( ( c / 365,25 ) - ,3343 ) ; f = Int ( e * 365,25 ) ; g = Int ( ( c - f ) / 30,61 ) ] ; // end of Let declarations // calculate the date Date ( If ( g > 13,5 ; (g - 1) - 12 ; g - 1 ) ; c - f - Int ( g * 30,61 ) ; If ( b < 2,5 ; e - 4715 ; e - 4716 ) ) ) Click to copy

Converts a Julian Daynumber into a FileMaker date

a JD number is based on November 24 -4713 (=day zero Gregorian)
which is January 1 -4712 (January 1 4713 BC) Julian.

In: JulianDayNumber - a Julian Daynumber
gregorian - optional: if <> 0 or empty use Gregorian calendar
if 0 use Julian calendar
defaults to Gregorian calendar

Return type: Date
Syntax: JDToDate ( jd ; 1 )

 

Comments

		Hezekiel, Finland Mar 8, 2017
This function worked for me, but it seems to put all dates of January into the PREVIOUS year.

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