The dates for entrance exams for all selective schools for year 8, 9 and 10 for 2016 are now published on their websites.
For year 8 students sitting an entry to year 9:
Melbourne High, MacRob. High, Nossal High, Cory High, June 18th.
For year 9 students sitting an entry to year 10:
Melbourne High, 7th June
MacRob. High, 8th June
Nossal High, 8th June
Cory High, 10th June
John Monash Science School, 11th June
For year 10 students sitting an entry to year 11:
John Monash Science School, 28th May
Elizabeth Blackburn, 23rd July
You should check the registration dates for the exam that interests you.