_AddMonths ( vDate ; vAddMonths )

Add x number of months to a given date

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Makah Encarnacao
Soliant Consulting
http://www.soliantconsulting.com/

Sample input:

_AddMonths ( "9/15/2017" ; 9 )

Sample output:

6/15/2018

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

/*@ Created by Makah Encarnacao at Soliant Consulting
   @ mencarnacao@soliantconsulting.com*/

Let(
[
vMonth = Month( vDate); 
vDay = Day( vDate);
vYear = Year( vDate)
];

Case(
 vMonth + vAddMonths > 12; 
Date( vMonth + vAddMonths - 12; vDay; vYear +1); 
Date( vMonth + vAddMonths; vDay; vYear)
)
)

This function will add months to a given date, for example 5/15/2014 + 3 months = 8/15/2014. It adds to the month value, and does not modify the day value (although FileMaker may automatically modify the day value if the resulting date is not valid). If you would like to subtract months instead of add months, you can tweak the custom function or see my function _SubtractMonths or enter a negative value for the 2nd parameter.

Comments

		Tim Anderson, Tim Anderson Group Sep 2, 2015
Can be more simple! FileMaker automatically converts a month number greater than 12 to years Let( [ vMonth = Month( vDate); vDay = Day( vDate); vYear = Year( vDate) ]; Date( vMonth + vAddMonths; vDay; vYear) )

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

_AddMonths ( vDate ; vAddMonths )

Comments

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