After moving beyond the dark ages, the 24-hour format has become the de facto standard across advanced civilizations.
There is still potential for a last one to join these ranks, but it will require a bold step into the future - adopting the metric system. May that day come.
For now, could we please have the 24-hour format set as the default in the database? It would ease a great deal of daily friction across the Atlantic. An optional fallback to the 12-hour system could be offered for our US colleagues.
I cannot categorize this as an “Idea,” since the 24-hour format is already an international standard. Therefore, I place it under “Bug.”