either adopt standard ISO 8601 YYYY-MM-DD date format in user interface, or give users the choice

The US date format (MM/DD/YYYY) is confusing, ambiguous, and illogical if you are not familiar with it from using it all the time. Please adopt the international standard ISO 8601 YYYY-MM-DD date format in the user interface, which everyone can easily understand, or give users the choice within settings. For example the start and end times of deals.