Hi Kriben -
You can include a countdown counter from any source (there's no countdown widget within CI360).
Here's an example from Nifty Images (I set up a count down to New Year's Eve):
https://img1.niftyimages.com/opn/urdi/tgui
Simply put this URL in your image configuration in the Layout Manager.
Note: Email client security checks may flag image links to a 3rd party domain as suspicious. Pursue a white-label/first-party domain option to avoid this issue.
If you find a service that you like that allows a first-party domain setup, please share!