Here is an example of a count down created in Logic Builder. You can download an example below.
The variables needed are below and they can be either a virtual point or property tag from one of your available objects you are running this on. We just created variables in the program not live points.
haystack (dateTime) - this variable is the date of the event we are counting down to.
now (dateTime) - this is to get the current date and time
haystackDay (numeric) - this is so that we convert the haystack variable to a number and based on days
nowDay (numeric) - this is to covert now variable to a number and to make it based on days
countDown (numeric) - this is where we subtract haystackDay from nowDay to get the remaining days to the event
Make sure you set the "DateToNumber" block and select the TimeSpan to "day" like below.
Download the below program file.