To selectively display specific layers and implement a countdown to the end of a promotion, you can utilize the 'countdown' transformation feature in Feed Mapper.
Begin by accessing the desired catalog.
Next, create a new field such as 'counter'. Apply the 'countdown' transformation to this field and input the target date in the format: YYYY-MM-DD.
Once the date is set, the field will automatically calculate and display the remaining days until that specific date. Remember to save your changes and synchronize the catalog.
Navigate to the relevant template and incorporate the layer or group of layers that need to be visible on the designated date.
