Save your calender as a downloadable asset
I believe the functionality to save a calender at any point as a PDF or other downloadable format is crutial. Once you have put your campaign dates on a calender you may want to share this around your company ie. directors, collegues ect and not enable them to make edits.
At the moment there is no function to do so and therefore your only options are to take a screen grab or re-create the whole document in another format.