The DELE exam is the official certification procedure available for students of Spanish as a Foreign Language. It is issued by the Instituto Cervantes on behalf of the Spanish Ministry of Education and Culture. The certificate does not have an expiration date, it is internationally recognized and is part of formal education in different countries.
During the first semester of 2015, 35,600 applicants took the exam for all levels, which constitutes a growth of 5.6% in comparison with 2014. The exam covers all levels as organized by the Common European Framework for Languages, which range from A1 to C1, beginner to proficient.
A further growth in the number of enrolled students is expected, since a DELE certificate will be a compulsory requirement for those aspiring to acquire Spanish citizenship: Sephardi Jews originally from Spain and non-Spanish speaking immigrants from all over the world will be required to demonstrate at least an A2 level of knowledge of the Spanish language if they wish to acquire a Spanish passport.
The exam is scheduled five dates per year. Right now, you still have time to sit the October and November dates. Bear in mind you should enroll by September 9th or October 14th 2015 respectively.