#!/bin/sh
# sdate - Never Ending September Date

# We don't bother with dates before 1993-09-01.

now=$(date +%s)
then=746834400

days=$(( (now + 86400 - then) / 86400 ))

case "$1" in
  -R) fmt="%a, $days Sep 1993 %T %z";;
  -I) fmt="1993-09-$days";;
  *) fmt="%a Sep $days %T %Z 1993";;
esac

date +"$fmt"