UPSC IAS Exam Notification 2017

Every Students Dream to be an IAS officer, So lets Discus about IAS Exam 2017 Prelims Exam Date and Mains Exam Dates IAS Exam 2017 Calendar 

hi i am new to ias exams age 30yrs. in how many stages this exam is conducted. eligibility? how many chances? when to register??

thanks in advance