Day of month
The 'Day of month' dimension reports the numeric day of any given month as a dimension value. For example, if you have a report spanning January 1 - March 31, the first of each month groups into the same dimension value. This report is valuable if you want a report broken out by day, but do not want a static date as dimension values. It is especially valuable as a dimension in scheduled reports, as this dimension rolls with the selected date range.
Populate this dimension with data
This dimension works out of the box for all implementations. If a report suite contains data, this dimension works.
Dimension values include the numbers 1 - 31 , representing the day of the month that the hit occurred on.