I need a task to become due 10 days after every quarter ends, or at least on the last day of each quarter. Is this possible?
We will consider improving the setting of recurring dates in the future. For now, please refer to this page: https://todoist.com/Help/timeInsert for a complete list of available recurring dates.
Currently, a month is considered 30 days, so more complex ones such as quarterly do not work properly, we will add more options as time goes on.