Maybe distinguish between "due date" and "scheduled date"

Currently Wieldy supports (for next actions) only one kind of date, which is labelled as "due date" but acts more like a "scheduled date" (e.g. when the date arrives, the task is moved to "today").

In practice, you often need to start tasks long before they are due. E.g. "buy Christmas present" or "learn for examn" have fixed due dates, but you one better schedule them some days or weeks before.