-i flag to perform a case-insensitive search with
$ ack -i easter ack/ack-bar.md 3:The [`ack`](https://beyondgrep.com/) utility has a fun Easter egg that dumps postgres/configure-the-timezone.md 18:Eastern time.
If you are a Vim user, you may be familiar with
--smart-case option is a related Ack feature worth checking out.
man ack for more details.