12 February: 

List of accepted mentoring organizations published on the Google Summer of Code 2018 site.

Interim Period: February 12 - March 12

Would-be students discuss project ideas with potential mentoring organizations.

12 March - 27 March

Student application period

Interim Period:

Mentoring organizations review and rank student proposals; where necessary, mentoring organizations may request further proposal detail from the student applicant.

Slot allocations published to mentoring organizations

April 23: 1600 UTC

Accepted student proposals announced on the Google Summer of Code 2016 site.

Community Bonding Period:

Students get to know mentors, read documentation, get up to speed to begin working on their projects.

14 May:

Students begin coding for their Google Summer of Code projects

15 June: 1600 UTC

Phase 1 Evaluation deadline; Google begins issuing student payments

6 August - 14 August: 1600 UTC

Final week: Students submit their final work product and their final mentor evaluation

14 August - 21 August: 1600 UTC

Mentors submit final student evaluations.

22 August

Final results of Google Summer of Code 2018 announced

October

Mentor Summit at Google: