The course is quite free but there are some deadlines to relate to:

Assignment 1 – Written assignment

Published in your examination repos wiki at the latest 2018-02-26 8:00.

Assignment 2 – Programming assignment

You make a release of your code in the GitHub repo for the  examination that has been created for you (named something like 1dv612/xx222xx-examination, where xx222xx is your username)
Deadline is 2018-03-14 12:00, make a release at your GitHub repo. Available times to book will be published at the course web page that week.