Convert string to date in bash

Question

I have a string in the format "yyyymmdd". It is a string in bash and I want to get it converted into a date so that all other date functions can be used on it.

"20121212" string into "20121212" date with format "%Y%m%d".

Answer 1

This worked for me :

date -d '20121212 7 days' date -d '12-DEC-2012 7 days' date -d '2012-12-12 7 days' date -d '2012-12-12 4:10:10PM 7 days' date -d '2012-12-12 16:10:55 7 days' 

then you can format output adding parameter '+%Y%m%d'