The new European General Data Protection Regulation will come into force throughout the European Union on May 25, 2018. The GDPR will replace existing data protection laws throughout Europe and introduce significant changes and additional requirements that will have a wide-ranging impact on businesses around the world, irrespective of where they operate. 

For details of the changes and additional requirements see: https://www.mayerbrown.com/experience/ eu-general-data-protection-regulation/