Yes you can!
At times, you may need to report in different time contexts. For example, your production day may run from 6am to 6am, and the week from Monday to Monday. But, when the bean counters are doing their cost accounting, they're interested in the week from Sunday to Sunday, and a day from midnight to midnight.
Flow understands that this is a common requirement, so to add a new calendar is relatively effortless.
Right-Click on Calendars > New > Calendar
Give your calendar a fitting name, e.g. Finance
While here, notice that one calendar has a bold typeface (e.g. the Production calendar in the previous image), while the others are normal. The calendar in bold is called the "Default Calendar". If you wish to make another calendar your default, right-click on a calendar that is not already a default, and select the option Set as Default
In our case, our Finance calendar is not our default, so leave Production as the Default Calendar.
Double-click the Finance calendar to open its property editor window
Now you can configure your additional calendar as required. For all measures that you need to associate the Finance Calendar with (those that you need to report on according to both the Production and Finance calendars), you will need to open the measure editors and drag the Finance calendar into the Context tab.
Once you've added the additional Calendar Context, the Data Engine will fetch data from the Backfill datetime and allocate the values into the time periods defined by the Finance calendar in addition to the previously defined time periods for the Production calendar.