Are the regional trains included in the interrail pass/ does 1 train journey on the regional train count as 1 travel day?

Included are journeys with any of the participating companies, whether regional trains or not. More details on the country pages.

Journeys and travel days are not the same. A travel day lasts from 0:00 until 23:59 and during that day, you can make as many journeys as you like.

If you have any specific questions, the best is to post it in a new topic.