Participants have two months to complete their individual course and may progress through the course as quickly (or as slowly) as they choose, as long as they finish prior to the cohort end date.
For example, if you sign up for the January cohort, you must finish by the end of March, before the next cohort begins.
If you register for two or three individual courses at the same time, you will need to complete all courses by the end of the cohort date. This does not apply to those taking the full certificate, as certificate participants have 12 months to complete all four courses.