[Date->Day] is an accessor for getting or setting the day of month field for a date object. [Date->Day] is a synonym for [Date->DayOfMonth]
Getting uses no parameters and returns the day of month as an integer.
Setting requires an integer parameter, and supports the =, += and -= operators. Setting modifies the date object in-place, but does not return a value.
Date Object->day Date Object->day=Integer Date Object->day+=Integer Date Object->day-=Integer
Use the [Date->Day] method. The following example uses a single date object, then gets the day of month and returns its value.
Next we set the day of month field to a new value using the = operator, then set it again by adding 1 to the day of month using the += operator, and set it once more by subtracting 1 from the day of month using the -= operator. We return the result for each set operation.
local('d') = date('2011-02-21') #d->day + '<br>' #d->day=5 #d + '<br>' #d->day+=1 #d + '<br>' #d->day-=1 #d
21 2011-02-05 00:00:00 2011-02-06 00:00:00 2011-02-05 00:00:00
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