I am still unclear about biodynamic calendar differences.
The Farmer's Almanac uses the Moon phases and climatic conditions of North American to suggest planting dates.
A Biodynamic planting calendar uses the Moon, Sun and other Celestial phases to suggest the best times to plant crops that will optimize Fruit, Flower, Leaf/Stem and, Root organs of that crop. Also to point out dark days or perigee period where no plant should be influenced. This is a very specific reference calendar. A grower most calibrate the time to her time zone. I know the Maria Thun's calendar is printed for Eastern Standard Time, therefore I read the calendar 3 hours fast as I am on the West Coast.
*Side Note* The influence of the Moon, Sun and, Celestial phases on various plant organs, types and, crops have been observed and documented within the Biodynamic community in repeatable scientific manners.
Hope that clarifies the difference between the two calendars.