const wchar_t * not_a_date() ;

String used printed is date is invalid.

const wchar_t * pos_infinity() ;

String used to for positive infinity value.

const wchar_t * neg_infinity() ;

String used to for positive infinity value.

month_format_spec month_format() ;

Describe month format.

ymd_order_spec date_order() ;

bool has_date_sep_chars() ;

This format uses '-' to separate date elements.

wchar_t year_sep_char() ;

Char to sep?

wchar_t month_sep_char() ;

char between year-month

wchar_t day_sep_char() ;

Char to separate month-day.

wchar_t hour_sep_char() ;

char between date-hours

wchar_t minute_sep_char() ;

char between hour and minute

wchar_t second_sep_char() ;

char for second