The easiest way to load the Mysql Time Zone tables from your Mac OS time zone fields is via this command:
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql
However, on many systems like mine that will fail because some of the time zone information is incompatible with the database schema for the time zone tables.
Therefore, you'll want to load the time zone information into a text file and edit it to only include the time zones you need. (Or, attempt to find the data breaking the import.)
mysql_tzinfo_to_sql /usr/share/zoneinfo > zone_import.sql
I edited the file to only include American time zones and UTC because they were all I need to test an app with.
After updating the zone_import.sql file, run this command to dump them to MySQL:
cat zone_import.sql | mysql -u root mysql
Once the file is imported, you'll need to restart MySQL. If you used HomeBrew to install it, these are your commands:
launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
Now that you have restarted MySQL, there is a simple test to check that the time zones are loaded. Launch the MySQL command line:
mysql -u root
Note: add -p if you need to enter a password to access your mysql db as root.
Once at the MySQL prompt, run this select:
select CONVERT_TZ(now(), 'UTC', 'America/New_York');
If either time zone does not exist in your time zone table, you will get back a 'NULL' value in the converted column. If both exist, you'll get back a timestamp and you're ready to go.
I came here from a search for "load mysql timezones in dbngin" just to add that if you are using dbnin it's going to look something like this:
/Users/Shared/DBngin/mysql/8.0.27/bin/mysql_tzinfo_to_sql(probably changing the version).
And I didn't have any issues with the timezones they got automatically skipped