I've installed Oracle instant client Version 19.8.0.0.0 on my macOS (Big Sur version 11.5.1) using instructions from the

CodePudding user response：

The default timezone files are bundled into the Instant Client libraries.

To change the timezone file used by your version of Instant Client:

• create a directory hierarchy instantclient_19_8/oracore/zoneinfo e.g. like mkdir -p instantclient_19_8/oracore/zoneinfo

• put the new timezone file in that directory

• set an environment variable ORA_TZFILE to the name of the file, e.g. timezone_n.dat. Don't include the path.

• You can check which file is being used by running genezi -v

This is discussed in the Oracle Client installation manual Environment Variables for Oracle Instant Client.

In a future major release of Instant Client you will be able to put the timezone file in any directory, and include that path in the environment variable value (Oracle enhancement 31333105).