Area of Validity
The Niedersachsen-Ticket is valid on regional transport everywhere in Lower Saxony, Bremen and Hamburg. It is also valid on IC trains between Bremen Hbf and Norddeich Mole/Emden Außenhafen. The Niedersachsen-Ticket "plus Ostharz" is also valid for example as far as Wernigerode, Quedlinburg, Aschersleben and Nordhausen, the Niedersachsen-Ticket "plus Groningen" is valid as far as Groningen (NL). Here you can find out more about the scope of the Niedersachsen-Ticket.
Period of Validity
Your Niedersachsen-Ticket is valid for one day: Mondays to Fridays from 9:00 am to 3:00 am on the next day, on Saturdays, Sundays and public holidays in Lower Saxony, during the Lower Saxony summer holidays and on Christmas Eve and New Year’s Eve from midnight to 3:00 am of the next day.