When a user profile language is set to English, the date under Project task and financial are showing as Jan 2026 (MON-YYYY), whereas when the language setting is changed to French, it's showing the time periods as date range (DD-MON-YYYY - DD-MON-YYYY).
Clarity 16.4.0
This can be adjusted by changing Label in Classic->Administration->Finance->Setup->Entities->Fiscal Time Periods and clicking on Translate for a given time period.