One of the main challenges for online learners is knowing how to effectively manage their time. Highly autonomous settings, such as Massive Open Online Courses (MOOCs), put additional pressure on learners in this regard. However, little is known about how learners organise their time in terms of sessions or blocks of time across a MOOC. This study examined session behavioural data of 9272 learners in a MOOC and its relation to their engagement, grade and self-report data measuring aspects of self-regulated learning (SRL). From an exploratory temporal approach using clustering and group comparison tests, we examined how learners distributed sessions in relation to their length and frequency across the course (macro aspect), and which types of activities they prioritised within these sessions (micro aspect). We then investigated if these patterns of sessions were related to learners' level of engagement, achievement and use of self-regulated learning (SRL) skills. We found that successful learners had more frequent and longer sessions across the course, mixed up activities within sessions, and changed the focus of activities within sessions across the course. In addition, session distribution was found to be a meaningful proxy for learners’ use of SRL skills related to time management and effort regulation. That is, learners with higher levels of time management and effort regulation had longer and more sessions across the course. Based on the results, implications for supporting specific session behaviours to promote effective learning in MOOCs are discussed.