官网上15欧元的Probe BahnCard 25有效期最晚是2015年

原文如下：
The Probe BahnCard 25 is valid for 3 months as from the 1st day of validity. It is automatically renewed by one further year (standard BahnCard subscription), unless notice of cancellation is given 6 weeks before the date of expiry. The new card will then be issued as a standard or reduced-rate BahnCard 25 for the same travel class. Last possible day for start of validity: 31.01.2015
说是要1月31日之前买，不知若想要6月用如何破