#!/bin/sh
[ ! -f "$HOME"/calendar ] && exit

set -- `date "+%Y %m %d"`

for pattern in "^$1-$2-$3" "^     $2-$3" "^$1-$2-[0-3][0-9]" "^     $2-[0-3][0-9]"
do
	>>/dev/null 2>&1 grep "$pattern" "$HOME"/calendar && {
		exec vi +/"$pattern"/ "$HOME"/calendar
		exit 1
	}
done
exec vi "$HOME"/calendar