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LeapYear ( date )

Months difference part between two dates.

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Ron Smith - Show more from this author

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

/* Based on the following reference with modifications: http://www.mitre.org/tech/cots/LEAPCALC.html */ If(Mod(Year(datez);4) ≠ 0;"N"; If(Mod(Year(datez);400) = 0;"Y"; If(Mod(Year(datez);100) = 0;"N"; "Y"))) Click to copy

The is a leap year calculation based upon a true mathematical calculation of leap year. The source of that calculation is given within the fuction itself to make sure the author is recognized.

 

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