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day(aDate[, dayNum])

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 Function  [other Function type actions]

 Item  [operators of similar scope]

 Date-time  [other Date-time operators]


 As at baseline

 [More on optional operator arguments]

day(aDate[, dayNum])

Alternatively, use


returns, as a Number, the day of the month from the aDate expression, which may simply be a date-type attribute value.

$MyNumber = day($MyDate); 

day(theDate, dayNum)

creates a new date based on the aDate expression, but in which the day of the month is dayNumDate is not changed unless theDate is an attribute and the attribute is re-setting itself:

$MyDateA = day($MyDate,14); $MyDate is unaltered

$MyDate = day($MyDate,14); $MyDate is changed

Examples. If $MyDate is July 4, 2009 then

$MyNumber = day($MyDate); …is 4

If $MyDate is July 4,2009, then

$MyDate = day($MyDate,5); 

will change $MyDate to July 5, 2009.