Bash increment a date on Mac OS X

Question

I am trying to increment date as follows (mac Catalina)

DATE=2019-01-01
NEXT_DATE=$(date +%m-%d-%Y -d "$DATE + 14 day")

but am getting date: illegal time format. How can I increment to the date?

Answer 1

In bash on Mac OS X, you can do like this:

date -j -v +14d -f "%Y-%m-%d" "2019-01-01" +%Y-%m-%d