The last day of February is the 29th for year 2020. Because of this, IFS Support normally sees several cases logged for an incorrect valid to date, in Statistical Periods.
All too often, the customer runs statistics (a.k.a. Aggregate Inventory Transaction Per Period), for the period. They get a background job error, indicating an incorrect valid to date is entered. They navigate to Statistical Periods, and try to change the valid to date. Unfortunately, at this point it is too late. Once statistics are run for the period, the dates cannot be changed. That is why it is so important to check your periods now (before February).
At this point the only way to correct the date, is via a billable data repair script. To avoid this type of situation, please check your February 2020 Periods. Make sure the end date/valid to date is set to February 29, 2020.