ToDoItem has subclasses EventItem and TaskItem. Items are ordered lexicographically by their ID string.
Date has subclass DateTime. Date is interpreted as having time 00:00 when compared with DateTime. Dates and times are ordered in their natural calendar ordering and their natural ordering on 24-hour clock.
ToDoItem has subclasses EventItem and TaskItem. Items are ordered lexicographically by their ID string. Date has subclass DateTime. Date is interpreted as having time 00:00 when compared with DateTime. Dates and times are ordered in their natural calendar ordering and their natural ordering on 24-hour clock.