How to loop through dates using Bash?

Question

I have such bash script:

array=( \'2015-01-01\', \'2015-01-02\' )

for i in \"${array[@]}\"
do
    python /home/user/executeJobs.py {i} &> /home/user/         


        

Answer 1

If you're stuck with busybox date, I've found working with timestamps to be the most reliable approach:

STARTDATE="2019-12-30"
ENDDATE="2020-01-04"

start=$(date -d $STARTDATE +%s)
end=$(date -d $ENDDATE +%s)

d="$start"
while [[ $d -le $end ]]
do
    date -d @$d +%Y-%m-%d

    d=$(( $d + 86400 ))
done

This will output:

2019-12-30
2019-12-31
2020-01-01
2020-01-02
2020-01-03
2020-01-04

Unix timestamp don't include leap seconds, so 1 day equals always exactly 86400 seconds.