Comment 1 for bug 2227

This is documented in /usr/share/doc/remind/README.Debian.gz, it was removed in 03.00.23-3
pasting from there:

rem
---
The upstream remind contains a script "rem" that uses a default reminder
file (~/.reminders) and calls remind with that. Since this script has had
several problems in the past, it has been dropped from the Debian package.

The functionality of "rem" is instead provided by "remind" itself, the
filename argument is optional if no date or time are specified. This change
is approved by the upstream author and is going to be part of future remind
upstream versions.