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FileMaker Pro Custom Functions

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Employ (StartDate, EndDate)

Pascal Dimopoulos, Primary School Education
http://uesrs.otenet.gr/~dnapas

Estimates the employment time between two dates.

Sample Input:

Employ("15/01/2000" ; "8/18/2007" )

Sample Output:

7 Years, 7 Months, 4 Days

Let ([ FBS=Case( Month(Date(2 ; 29 ; Year(StartDate) ) ) = 3 ; 28 ; 29 ); FBE=Case( Month(Date(2 ; 29 ; Year(EndDate) ) ) = 3 ; 28 ; 29 ); LDS=Case( Month(StartDate)=1; 31; Month(StartDate)=2; FBS; Month(StartDate)=3; 31; Month(StartDate)=4; 30; Month(StartDate)=5; 31; Month(StartDate)=6; 30; Month(StartDate)=7; 31; Month(StartDate)=8; 31; Month(StartDate)=9; 30; Month(StartDate)=10; 31; Month(StartDate)=11; 30; Month(StartDate)=12; 31); LDE=Case( Month(EndDate)=1; 31; Month(EndDate)=2; FBE; Month(EndDate)=3; 31; Month(EndDate)=4; 30; Month(EndDate)=5; 31; Month(EndDate)=6; 30; Month(EndDate)=7; 31; Month(EndDate)=8; 31; Month(EndDate)=9; 30; Month(EndDate)=10; 31; Month(EndDate)=11; 30; Month(EndDate)=12; 31); Zero_Factor=Day(StartDate)=1 and Day(EndDate)=LDE; d=Case( Zero_Factor; 0; Day(StartDate)- Day(EndDate) > 0; Day(EndDate)+LDS-Day(StartDate)+1; Day(StartDate)- Day(EndDate)< 0 ; Day(EndDate)-Day(StartDate)+1; 1 ); m0=Case( Month(StartDate)-Month(EndDate)>0 and Day(StartDate)-Day(EndDate)>0; Month(EndDate)+11-Month(StartDate); Month(StartDate)-Month(EndDate)>0 and Day(StartDate)-Day(EndDate) ≤ 0; Month(EndDate)+12-Month(StartDate); Month(StartDate)-Month(EndDate)<0 and Day(StartDate)-Day(EndDate)>0; Month(EndDate)-Month(StartDate)-1; Month(StartDate)-Month(EndDate)<0 and Day(StartDate)-Day(EndDate) ≤ 0; Month(EndDate)-Month(StartDate); Month(StartDate)-Month(EndDate) = 0 and Day(StartDate)-Day(EndDate)>0; 11; Month(StartDate)-Month(EndDate)=0 and Day(StartDate)-Day(EndDate) ≤ 0; Month(EndDate)-Month(StartDate)); m=Case( m0=11 and Zero_Factor; 0; Zero_Factor; m0+1; m0); Zero_Factor_2=Zero_Factor and m0=11; y0=Year(EndDate)-Year(StartDate); y=Case( Zero_Factor_2 and Month(StartDate)-Month(EndDate)> 0; y0; Zero_Factor_2 and Month(StartDate)-Month(EndDate)< 0; y0+1; Month(StartDate)-Month(EndDate) =0 and Day(StartDate)-Day(EndDate) > 0; y0-1; Month(StartDate)-Month(EndDate) = 0 and Day(StartDate)-Day(EndDate) ≤ 0; y0; Month(StartDate)-Month(EndDate) > 0 and Day(StartDate)-Day(EndDate) < 0; y0-1; Month(StartDate)-Month(EndDate)> 0 and Day(StartDate)-Day(EndDate) ≥ 0; y0-1; y0); NY=If (y=1; "Year";"Years"); ΝΜ=If(m=1; "Month"; "Months"); ND=If(d=1; "Day";"Days") ]; y &" " & NY & "," &" " & m&" " & ΝΜ &","&" " & d &" " & ND)
Then copy & paste into FileMaker Advanced's Edit Custom Function window.

if you have myFMbutler's Clip Manager installed

Description:

Employ (StartDate, EndDate).
Estimates the employment time between two dates. It is 100% accurate, because it does not use the usual devidors to estimate months or days (30,475, or 365,25). Fixes common problems as to include the day that an employment starts,not missing days between years and fixes many other problems that many similar functions can not solve.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

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