The zoneinfo module provides a concrete time zone implementation to support the IANA time zone database as originally specified in PEP 615. By default, zoneinfo uses the system’s time zone data if available; if no system time zone data is available, the library will fall back to using the first-party tzdata package available on PyPI.
A read-only sequence representing the time zone search path – when constructing a ZoneInfo from a key, the key is joined to each entry in the TZPATH, and the first file found is used.