To access the Winter ‘13 Release Training:

1. Log in to Salesforce.com
2. Navigate to Help & Training | Take Training
3. Filter Product by Release Training
4. Expand the Winter ‘13 Release Training node

Release Notes:

https://na1.salesforce.com/help/doc/en/salesforce_winter13_release_notes.pdf

Deadlines to Complete the Exam:

Winter ‘13 exams must be completed by Friday, June 28, 2013 (applies to individuals certified in Summer ’12 or earlier).