I have two suggestions for improving usability with regard to the handling of dates in Manager:
Allow more flexibility when dates are inputted; for example, if the regional setting is US (MM/DD/YYYY), date fields should be programmed to accept an entry of
010216and automatically reformat it as
01/02/2016. This would greatly improve usability in data entry and reduce errors. (Currently, if the user tries to enter a 2-digit year, for example, the date changes to something totally unexpected.)
To accommodate trans-border business where the company and customer are in regions that expect different date formats, either allow dates to be formatted separately from the system date format (e.g., company in the US sends an invoice to a customer in Canada, so MM/DD/YYYY is used for data-entry but DD/MM/YYYY prints on the invoice), or at a minimum allow the format specification to be printed on the invoice so the customer knows whether 05/12/2015 is in July or December.