...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::date_time::ymd_order_spec — Enum for distinguishing the order of Month, Day, & Year.
enum ymd_order_spec { ymd_order_iso, ymd_order_dmy, ymd_order_us };