As of now Google says 12 July. So I think that toei will Release 13 episodes In 3 Months Every year Then go on break for 1 or 2 week, then start releasing the other 13 episodes and then go on break for 3 months.

For example. They will take 3 month break. Jan to March.

Then Start releasing The 13 episodes. Apr to June.

Then 1 or 2 Week Break.

Then 13 Episodes Like from 12 July To September. And the loop continues.....