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# Difference between two Timestamps

## Difference between two Timestamps

(OP)
Hello everyone,

using ksh I need to figure out how many days have passed between a timestamp and the current date of today.

Format of the timestamp is:

YYYYMMDD (e.G. 20200703)

Using

#### CODE

date +%Y%m%d

will give me the correct format for the current date and at first sight simply substracting both is working fine as long as both are within the same month ...

e.G.

#### CODE

20200716 - 20200703

Problem is obvious:

#### CODE

20200801 - 20200703

Any ideas how to solve this ?

Best Regards,
Thomas

### RE: Difference between two Timestamps

Hi

Such math is usually done with Unix times :

#### CODE --> Ksh

date='20200703'
echo $(( ($( date +'%s' ) - $( date -d "$date" +'%s' )) / 24 / 60 / 60 )) 

Feherke.
feherke.github.io

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