There are 4 types of Date Ranges in the report. 

1. General Report Date Range

This date range you find it on the right side panel of the report and it influences every widget and KPI inside the report.
This date range doesn't change unless you change it, so if you choose "this month" on May, whenever you open the report again in October, it will show the date range of May still, not the current "this month". The report will then show "February". 

2. Comparison Date Range

The "compare date range" also located on the right side panel is the Report's comparative date range, you can only choose one and will affect all widgets and KPIs with the "comparison check box" enabled inside the widgets/KPIs. 

3. Date Range inside Widgets and KPIs

You find this option inside the widget/KPIs settings, choose the Date Range tab.
Here, you will have the same date range and comparison date range options available as you have in the report. These settings allow you to have widgets with different date range settings than you have set up in the report.

4. Date Range inside the Scheduled reports 

The Date Ranges in the scheduled report is different from the general date range in the draft report. Whenever you set a report for scheduling it, you have to set a standard date range, it could be "past x days/weeks/months", the last 7 days, or a custom date range starting at one specific day.
Don't worry that your draft report has a different date range than the one you set on the scheduled. The report will be automatically sent with the one in the Scheduled. 

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