How navision calculate 1M to days ?

Dynamics 365 Business Central/NAV Developers Forum
1

How navision calculate 1M ? it 's 30 days or 31 days ?

Many thanks .

2

It simply adds 1 month to before date like

Before Date = 27-01-14 then

message(’%1’,CALCDATE(’<1M>’,270114D)); will be

27-02-14