Sundar Pichai, Google SVP of Android, Chrome and Apps announced on Google+ the dates for Google I/O 2015 in San Francisco: May 28-29.
The registration will be opened on March 17 at 09:00 AM PDT and will close on March 19 at 5:00PM PDT. After that, a lottery of tickets will be done to select the developers who will be able to purchase tickets. General Admission tickets cost $900 but Academic tickets are only $300.
If you won't be able to attend I/O in person, you can still join online (in the Google I/O website) or attend one of the I/O Extended events worldwide. GDG Philippines will have another I/O Extended event this year. For updates, add GDG Philippines in your Google+ circles.