Shell script (Linux, macOS) that outputs the date of the last week

#!/bin/sh

#Loop from 7 to 1
for N in `seq 7 -1 1`
do
  #From 7 days ago to 1 day ago
  DATE=`date +%Y-%m-%d --date "${N} days ago"`
  echo $DATE
done

$ ./1week.sh 
2020-06-27
2020-06-28
2020-06-29
2020-06-30
2020-07-01
2020-07-02
2020-07-03

#!/bin/sh

#Loop from 7 to 1
for N in `seq 7 -1 1`
do
  # -v-From 7d-v-Up to 1d
  DATE=`date -v-${N}d +%Y-%m-%d`
  echo $DATE
done

$ ./1week.sh 
2020-06-27
2020-06-28
2020-06-29
2020-06-30
2020-07-01
2020-07-02
2020-07-03

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