Dec 2022 points would be points transferred into your June 2022 use year. At any given point in time, you can do one transfer that effects your current use year and one that effects your next use year. Thus, today, if you have not done any transfers, you could have someone transfer to you Dec 2022 points into your June 2022 use year and someone else to transfer Dec 2023 points into your June 2023 points.