On 2024-05-13 19:37 +0200, Christophe Pettus wrote: > PostgreSQL 16.3 on MacOS Sonoma. A long-running process (which held a > connection open the entire time) failed with: > > 2024-05-13 09:12:44.719 PDT,"cyan","cyan",35926,"[local]",664214f9.8c56,3,"SELECT",2024-05-13 06:26:17 PDT,3/444460,0,ERROR,22023,"invalid value for parameter ""TimeZone"": ""UTC""",,,,,"while setting parameter ""TimeZone"" to ""UTC"" > parallel worker"," select count(1), count(1) filter (where visited > 0) from framework_seenchoice ",,,"","client backend",,0 > > It's not (easily) repeatable, and the system was not touched while the > process was running (no installing new binaries, etc.). Does this > look familiar to anyone? Could be the same issue as [1] (also on macOS). Can you trigger that error with: SET timezone = 'UTC'; And what's the output of: SELECT * FROM pg_timezone_names ORDER BY name; [1] https://www.postgresql.org/message-id/5DF49366-10D1-42A4-99BF-F9A7DC3AB0F4%40mailbox.org -- Erik