Every month USCIS decides separately whether adjustment of status applicants may use the Dates for Filing chart or must use Final Action Dates. That decision determines whether you can file at all.
Dates for Filing allows applications to be submitted earlier than final approval would allow. When USCIS designates this chart, adjustment applicants whose priority date is earlier than the listed date may file, even though a visa is not yet available for final approval.
Final Action Dates shows when a visa may actually be issued or status approved. When USCIS designates this chart, an application may only be filed once the priority date is earlier than the listed date.
This page reports which chart USCIS says applies. It does not tell you whether to file, which depends on your priority date, category and country of chargeability.