What is 'Day's on program?' Samantha July 31, 2019 14:33 Updated Follow This is the number of days since you started your Zing Performance program. Related articles How often do I do my Zing exercises? Can I download the Zing Performance app to more than one device? What is a 'Zing Day?' Why have I been striked out? Comments 0 comments Article is closed for comments.