offtime_r
struct tm *offtime_r(const time_t *, long, struct tm *) __RENAME(__offtime_r50);
struct tm *offtime_r(const int32_t *, long, struct tm *);
return offtime_r(timep, offset, tm_multi(&tm, OFFTIME_TM_MULTI));
# if TZ_TIME_T || !defined offtime_r
struct tm *offtime_r(time_t const *restrict, long, struct tm *restrict);