When did high school DxD season 4 come out?

Related questions

1. Is there a season 5 of highschool DxD?
2. Will there be a fourth season of highschool DxD?
3. Will there be a new high school DxD?
4. What does DxD mean in high school DXD?

Tags

1. #company
2. #international
3. #scheduled
4. #premiere
5. #although
6. #april
7. #spring
8. #season
9. #there
10. #officially
11. #highschool
12. #confirmed
13. #release
14. #exact
15. #passione
16. #delay
17. #anime
18. #production
19. #audiences
20. #minor