Unfortunately, the system is designed only to deliver each lesson one per day, in sequential order. Therefore, it is not possible for us to arrange your lessons to begin on a certain day. If this is important to you, the best thing to do is set a calendar notice to remind you on the day you wish to subscribe.
It is relevant to note that the first message sent is the Course Introduction, and the 1st official 'lesson' is delivered the following morning. So if you wanted to start with Lesson #1 on January 1st, you would need to sign up on December 31st.