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hour(aDate[, hoursNum])

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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]



Alternatively, use Date.hour.


returns the hour element from the aDate date/time expression, which may simply be a date-type attribute value.

hour(theDate, hoursNum)

creates a new date based on the aDate expression, but in which the hour is hoursNum. aDate is not changed unless theDate is an attribute and the attribute is re-setting itself:

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

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

Examples. If $MyDate is July 4,2009 09:30, then


will change $MyDate to July 4, 2009 19:30.