tzf

pig build pkg pg_tzf;		# build rpm/deb

pig repo add pgsql -u   # add both repo and update cache

pig install pg_tzf;		# install via package name, for the active PG version
pig install tzf;		# install by extension name, for the current active PG version

pig install tzf -v 18;   # install for PG 18
pig install tzf -v 17;   # install for PG 17
pig install tzf -v 16;   # install for PG 16
pig install tzf -v 15;   # install for PG 15
pig install tzf -v 14;   # install for PG 14

CREATE EXTENSION tzf;

CREATE EXTENSION tzf;

SELECT tzf_tzname(116.3883, 39.9289) AS timezone;
-- Asia/Shanghai

SELECT unnest(
  tzf_tzname_batch(
    ARRAY[-74.0060, -118.2437, 139.6917],
    ARRAY[40.7128, 34.0522, 35.6895]
  )
) AS timezones;
-- America/New_York
-- America/Los_Angeles
-- Asia/Tokyo

SELECT tzf_tzname_point(point(-74.0060, 40.7128)) AS timezone;
-- America/New_York

SELECT unnest(
  tzf_tzname_batch_points(
    ARRAY[
      point(-74.0060, 40.7128),
      point(-118.2437, 34.0522),
      point(139.6917, 35.6895)
    ]
  )
) AS timezones;
-- America/New_York
-- America/Los_Angeles
-- Asia/Tokyo