Bash 5.0 printf TZ ambiguous DST transition handling remains undefined
Bash 5.0 printf %(%Y-%m-%d)T and DST ambiguity The goal is to generate reproducible date strings from epoch values using Bash’s printf with the %T format, while respecting the time zone specified via TZ . In practice, ambiguous times that occur during daylight‑saving transitions (e.g., 2026‑03‑27 02:30 in Europe/Paris) can be interpreted as either the earlie