shell loop through dates

 Easy command to loop through the dates : 

for i in 2022-01-{01..31} 2022-02-{01..15}; do echo $i; done

More comprehensive command :

d=2015-01-01
while [ "$d" != 2015-02-20 ]; do 
  echo $d
  d=$(date -I -d "$d + 1 day")
done