The zsh/langinfo module makes available one parameter:
langinfoAn associative array that maps langinfo elements to their values.
Your implementation may support a number of the following keys:
CODESET,
D_T_FMT,
D_FMT,
T_FMT,
RADIXCHAR,
THOUSEP,
YESEXPR,
NOEXPR,
CRNCYSTR,
ABDAY_{1..7},
DAY_{1..7},
ABMON_{1..12},
MON_{1..12},
T_FMT_AMPM,
AM_STR,
PM_STR,
ERA,
ERA_D_FMT,
ERA_D_T_FMT,
ERA_T_FMT,
ALT_DIGITS