d=`date +%d`
m=`date +%m`
y=`date +%Y`
x1=15
x2=14
if [ "$1" = 0 -o "$1" = 1 -o "$1" = 2 ]
then
x1=30
x2=-1
fi
awk ' BEGIN { 
split("31,28,31,30,31,30,31,31,30,31,30,31",dm,",")
x1="'"$x1"'"
x2="'"$x2"'"
d='$d'
m='$m'
y='$y'

d1=d-x1
m1=m
y1=y
if(d1<=0)
{
	m1--
	if (m1==0)
	{
		y1--
		m1=12
	}
	d1 +=dm[m1]
}

d2=d+x2
m2=m
y2=y
if(d2>dm[m2])
{
	d2 -=dm[m2]
	m2++
	if (m2==13)
	{
		y2++
		m2=1
	}
}

printf "%.2d/%.2d/%d ",d1,m1,y1
printf "%.2d/%.2d/%d\n",d2,m2,y2

} '

