This MFD recreates the functionalities of the "Date" window of the "Scenario Editor". This can be useful in long flights, allowing to change the date more quickly than opening and using the "Scenario Editor".
UPDATE:
With the new version this MFD also allows you to quickly save your simulation with some features.
No more horrible automatic quicksaves names like "(Current state) 0004 0001 0001" and no need to call the Scenario Editor to save with a name.
Moreover, now the current configuration is saved on a cfg file.