You set the start date the same manner as the due date, by setting the start object to a date:
You can set it when you create the card, or afterwards by updating the card.
Yes, I know, the start object isn't specifically mentioned in the REST API documentation, but then again, not every single object is; you get this from time to time with REST API documentation.
Chances are, if a user configurable object can be found via a GET, then it most likely can also be set via a POST or an UPDATE :)
Congratulations to @Laura Holton , our latest winner of Taco Tuesday! And thanks to @Kristján Geir Mathiesen for sharing the picture of Taco having fun with his new friend B...
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