How long is the special offer BahnCard 25 valid?

A BahnCard 25 purchased during the special offer period is valid for 12 months from the first day of validity. It must be cancelled in writing four weeks before its expiration date. If not, it will be continued as a regular BahnCard or a discounted one, such as a BahnCard for senior citizens or a My BahnCard for young people, in first or second class, as appropriate. Your date of birth is used to check which BahnCard will be selected as the subsequent card.