Future Learn gives free scheduled courses. Depending on the course they run from a start date for 4+ weeks. Some courses are 8 weeks.
For example Spanish courses they have 6 courses for which the first beginner an is a 4 weeks course and has been missed in Aug 16. Which is just basic. But you can join that and catch up. All you would have missed is the FAQ's. SO you can join the beginners 2 and carry on.
Check the FAQ's few of the main ones are
Where and when do courses take place?
All FutureLearn courses happen online at futurelearn.com.
Courses start at midnight on Mondays (00:00 UTC) on the day shown on the course page.
Once a course has started, you will be able to access the course material and study at any time that suits you. You don’t need to be online at the same time as the lead educator or other students.
After the start date, you will be able to access the course by following the “Go to course” link at Your courses.
How much does it cost to join a course?
It is free to join and study any FutureLearn course.
At the end of the course, learners are offered the opportunity to purchase a certificate. The price includes both a digital and printed version, and VAT or local sales tax. Purchasing one is optional.
Full FAQ's in my first comment to answer all your qualms.
I haven't browsed all the courses to see th end date, but I guess there is none as of yet.