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Add 1 year to System date in script

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# 1  
Old 09-02-2009
Add 1 year to System date in script
Hi All,

I wanted to add 1 year to the system date in my script.

say export start_date=`date +%F`
echo $start_date
o/p of this is 2009-09-02

To this i want to add 1 year.
the output i need here is 2010-09-02

can anybody help me ?

Thanks in advance,
Vinay
# 2  
Old 09-02-2009
One "stupid" way to do that :
Code:
export start_date=$(echo $(echo `date +%Y` + 1 | bc)-$(date +%m)-$(date +%d))

There must be a smarter solution ^^
# 3  
Old 09-02-2009
man date like always Smilie
On FreeBSD I use
Code:
# date -v +1y +%F
2010-09-02

# 4  
Old 09-02-2009
well...since years don't have awkward diferent lengths like months you could do:

Code:
date +%F | awk  '{FS=OFS="-";$1++;print}'
2010-09-02

# 5  
Old 09-02-2009
My awk don't like Tytalus solution
Code:
date +%F | awk  'BEGIN{FS=OFS="-"}{$1++}1'
2010-09-02

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