If I were to sync my Todoist tasks with Apple's iCal, how exactly would the tasks show up on the calendar? Would they be displayed as all-day events, for example?
Yes, they would show up as all-day events, they do not include any due date information. It's also, only one-way sync, changes made to iCal will not change Todoist.
We hope we can change this in the future.
Thanks! Just to be clear, when you say they do not include any due date information, tasks will appear as all-day events for the days they are due, right?
Yes, that's correct. Only tasks with a date and time will consider this time as a reference.