Use the Period tab of the Report Tag properties folder to select a preset time period or configure a custom time period for the report to be generated by this tag.
Last versus Previous:
The terms “Last” and “Previous” mean different things in the context of a report. “Last” refers to a time period ending at present (or at a defined end time if defining a custom period). “Previous” refers to the most recent full period where weeks end on Sunday night, days end at one second before midnight, and hours end one second before the top of the hour.
For example, suppose that the current time is 3:25 p.m. on a Tuesday. “Last 24 hours before trigger time” refers to the period from 3:25 p.m. Monday until 3:25 p.m. Tuesday.
“Previous calendar day” refers to the period from 12:00 a.m. Monday until 11:59 p.m. Monday.

Presets
The Presets drop-down list can be used to select a pre-configured period of time for the data to be included in this report. The available options are shown in the preceding image:
If Custom is selected, further options will be available, as shown:

Period Type
The selection offers a choice between Previous Time Period or Duration and End Time.
Previous Time Period:
Select a time period (Days, Weeks, etc.) from the drop down list and enter a number in the field provided. “Previous”, refers to the most recent time period, ending at a standard boundary such as the midnight, etc.
Duration and End Time:
Sets the length of time that should be included in the report, ending at a set length of time prior to the trigger event.
