remind(1) on Linux
The text 0cd55d0d03c3, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.
a sophisticated reminder service
Flags it lists
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-a -
-b -
-dchars -
-e -
-f -
-h -
-i -
-k -
-l -
-m -
-n -
-o -
-q -
-r -
-t -
-tn -
-u -
-v -
-x -
-y -
-z