Where: [[JulianDate]] - a numerical expression specifying the Julian Date
[[M]] - a numerical expression specifying the number of calendar months from the specified Julian date; if the value of [[M]] is positive, a date after the specified date will be returned; if the value of [[M]] is negative, a date before the specified date will be returned
==== Example ====
<syntaxhighlight>IncMonth(39417,1) will return a value of 39448, corresponding to January 1st, 2008, one calendar