Nation wide updated event calendar

Hi

Is there a good calendar for nationwide events like festivals, fireworks, flower blooming periods and alike?
Best would be of course if it's updated.
There's some calendars I know like walkerplus. But usually they are for specific events like 花見.
I first need to find out in general what is good when.
Can be in Japanese.

Thank you!

Walker Plus
(Other than cherry blossoms and autumn leaves)
https://www.walkerplus.com/ranking/event/
Japan National Tourism Organization
https://www.japan.travel/en/
This page may be particularly helpful.
https://www.japan.travel/en/things-to-do/festivals-and-events/
Time Out Tokyo (lots of information about Tokyo)
https://www.timeout.com/tokyo