There is a function named getTimeZoneDatabase in date_time_support.cpp and in operation_context.h

If operation_context.h is force included into date_time_support.cpp, this will cause an error with MSVC.

src\mongo\db\query\datetime\date_time_support.cpp(137,31): error C2872: 'getTimeZoneDatabase': ambiguous symbol
    return getTimeZoneDatabase(serviceContext).get();
                              ^