This guide addition documents how to configure your Rails application to
use the data type "timestamp with time zone" (timezone-aware timestamp),
instead of the default type, "timestamp without time zone"

Support for this data type was added earlier in Active Record, but
requires a configuration change in order to use, and from these PR
comments, where, why, and how to perform this configuration change
wasn't added to the Rails Guides Active Record PostgreSQL documentation
from what I could tell

Related PR: https://github.com/rails/rails/pull/41084

Guide page: https://guides.rubyonrails.org/active_record_postgresql.html

PostgreSQL best practices:
https://wiki.postgresql.org/wiki/Don't_Do_This#Don.27t_use_timestamp_.28without_time_zone.29