Remind is a sophisticated command-line calendar and alarm program
with a sophisticated scripting language and intelligent handling of
exceptions and holidays.

Sighted users can use the GUI typing: tkremind
You will have an icon for it in the notification area of the desktop's panel.

In text mode you can type rem or remind

Remind is not full localized. However, you can localize the day and month names, etc. at run-time
by placing the following line at the top of your $HOME/.reminders file:
INCLUDE [$SysInclude]/lang/auto.rem

In Slint this is done when a new user is created, if the package was already installed.

To know more, visit this wiki:
https://dianne.skoll.ca/wiki/Remind

and this blog article:
https://blog.thechases.com/posts/remind/

mailing list:
https://dianne.skoll.ca/mailman/listinfo/remind-fans

and read the man pages, typing for isnace:

man remind
man tkremind

The content of the package is listed below:
/usr/bin/rem # symbolic link to /usr/bin/remind
/usr/bin/remind
/usr/bin/rem2ps
/usr/bin/tkremind
/usr/bin/rem2html
/usr/bin/rem2pdf
/usr/man/man1/rem2ps.1.gz
/usr/man/man1/remind.1.gz
/usr/man/man1/tkremind.1.gz
/usr/man/man1/rem.1.gz
/usr/man/man1/rem2html.1.gz
/usr/man/man1/rem2pdf.1.gz
/usr/man/man3/Remind::PDF.3.gz
/usr/man/man3/Remind::PDF::Entry.3.gz
/usr/share/remind/ansitext.rem
/usr/share/remind/holidays/ca.rem
/usr/share/remind/holidays/fr.rem
/usr/share/remind/holidays/gr.rem
/usr/share/remind/holidays/ie.rem
/usr/share/remind/holidays/jewish.rem
/usr/share/remind/holidays/us.rem
/usr/share/remind/lang/auto.rem
/usr/share/remind/lang/da.rem
/usr/share/remind/lang/de.rem
/usr/share/remind/lang/en.rem
/usr/share/remind/lang/es.rem
/usr/share/remind/lang/fi.rem
/usr/share/remind/lang/fr.rem
/usr/share/remind/lang/gr.rem
/usr/share/remind/lang/is.rem
/usr/share/remind/lang/it.rem
/usr/share/remind/lang/nl.rem
/usr/share/remind/lang/no.rem
/usr/share/remind/lang/pl.rem
/usr/share/remind/lang/pt.rem
/usr/share/remind/lang/ro.rem
/usr/share/remind/seasons.rem
/usr/share/remind/site/README
/usr/share/perl5/vendor_perl/Remind/PDF/Entry.pm
/usr/share/perl5/vendor_perl/Remind/PDF.pm
/usr/lib64/perl5/vendor_perl/auto/Remind/PDF/.packlist
/usr/lib64/perl5/perllocal.pod
/usr/doc/remind-04.02.06/COPYRIGHT
/usr/doc/remind-04.02.06/MICROSOFT-AND-APPLE
/usr/doc/remind-04.02.06/README
/usr/doc/remind-04.02.06/remind.SlackBuild