What does 10 or 15 days within 2 months mean?
A Eurail pass with 10 or 15 days within 2 months means that you get 10 or 15 travel days, during which you can travel by train within a 2 month period. Travel days are flexible, so you can decide on the go when you want to use them.
If you order a Global Pass - 10 days within 2 months and you activate your pass to be valid from April 1 to May 30, you can choose any 10 days during that period on which to travel by train. Travel days are flexible so you can decide on the go when you use each one.
All Eurail passes are available with this type of validity. The number of travel days and the pass validity varies depending on the pass type and the selected country(s). You can view Eurail passes to see all the different options available.
When traveling with a pass it's important that you write the date of each travel day in the travel calendar on your pass, before boarding the first train of that day.
When traveling on a direct night train departing after 7 p.m. (19:00) and arriving at its final stop after 4 a.m. (04:00), you just need to fill in the date of arrival in the travel calendar, even if you leave the train before 4 a.m.. This is known as the 7 p.m. rule.