This tab looks like this:

The Currency cannot be changed, since it is based on your country.

There are three options for Date format, which is used both for data entry and for most date displays (except in the top section of reports and receipts). The options are YYYY-MM-DD (the most official format for Canada), MM/DD/YYYY (the most official format for the USA) and DD/MM/YYYY (also commonly used in Canada).