Difference(s): A task can be done at any time before the due date (in the case that it has one) while an event must start and end at a specific time. A task is actionable whereas an event may be actionable or not (e.g. Father's day: all day; World war 2: 1939-1945). Similarit(ies): Remarks: Non actionable events may generate tasks (e.g. task - buy present; event - mum's birthday)