unfortunately, it's not possible right now. Thank you for the suggestion, we appreciate it and will consider adding it in future development.
Feel free to add your suggestion to our Votebox:
Actually, it is possible, but it's kind of a hidden feature right now :-). We will write more documentation about it later on.
You can mass select tasks by control-clicking on them (on Mac it's command click). This way you can select multiple tasks and change due dates on them.
Amir, I clicked on several tasks but I still seem to need to go into each task and edit the task to change the due date. Am I doing something wrong?
before you start selecting tasks, hold Ctrl, then select all tasks which due dates you want to change.
Once you select the first task this way, it should get highlighted and a small menu bar on the top of the screen should appear. Choose "Change date" from this menu and enter a new due date which will be applied to all selected (highlighted) tasks.
Great tip, Amir! Thank you!