Get translated day of week error

Found a bug with this recipe: {{ 'DAYS_OF_THE_WEEK'|ta(post.date|date('w') - 1) }} when the day is Sunday. post.date|date('w') is equal 0 and minus 1 becomes -1 and I see this on my page: DAYS_OF_THE_WEEK[-1]

How to fix it?

Solved by: {{ 'DAYS_OF_THE_WEEK'|ta(post.date|date('N') - 1) }}