Find the days you did not contribute to GitHub

github_missing_days.sh

#!/bin/sh

USER=${GITHUB_USER}
FROM=$(date -u +"%Y-01-01T00:00:00Z")
TO=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

gh api graphql -f query='
query($login:String!,$from:DateTime!,$to:DateTime!){
  user(login:$login){
	contributionsCollection(from:$from,to:$to){
	  contributionCalendar{
		weeks{
		  contributionDays{ date contributionCount }
		}
	  }
	}
  }
}' -F login="$USER" -F from="$FROM" -F to="$TO" \
| jq -r '.data.user.contributionsCollection.contributionCalendar.weeks[]
		 .contributionDays[] | select(.contributionCount==0) | .date'