Add X days to a particular date in BASH

Question

Totally new to BASH. Apologies in advance.

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Problem

I\'d like to add X days to a specific date.

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Code

Answer 1

You can do this way:

dt='2017-09-20'

date -d "$dt +1 day"
Thu Sep 21 00:00:00 EDT 2017

date -d "$dt +2 day"
Fri Sep 22 00:00:00 EDT 2017

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It seems OP is using OSX. You can use date addition this way:

s='20/09/2017'
date -j -v +1d -f "%d/%m/%Y" "$s"

Thu Sep 21 14:49:51 EDT 2017

Answer 2

You can do something like this:

date -d "Sun Sep 6 02:00:00 IST 2012+10 days"