# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

mode cockroach

query T
select count(distinct utc_offset) >= 24 as ok from pg_timezone_abbrevs
----
true

query TT
SELECT timezone_offset('America/Denver', '2000-06-01 00:00:00 UTC'), timezone_offset('America/Denver', '2000-12-01 00:00:00 UTC')
----
(MDT,-07:00:00,01:00:00)  (MST,-07:00:00,00:00:00)

statement ok
SET unsafe_new_transaction_wall_time = '2000-06-01 00:00:00 UTC';

query TTTT
SELECT * FROM pg_catalog.pg_timezone_names where name = 'America/Denver'
----
America/Denver  MDT  -06:00:00  true

statement ok
SET unsafe_new_transaction_wall_time = '2000-12-01 00:00:00 UTC';

query TTTT
SELECT * FROM pg_catalog.pg_timezone_names where name = 'America/Denver'
----
America/Denver  MST  -07:00:00  false

# time zone definitions are validated in misc/python/materialize/postgres_consistency/custom/predefined_pg_queries.py