Yes, using the calendar to help picking days for taking cuttings, popping seeds, and especially harvest . The calendar has days for fruit, root, leaf, flower plants. Following the flower days I found great success. Have you ever noticed a burst of growth of white hairs toward the end of a flower cycle? This is because the flower day has just passed and it would be better to wait for the next one to harvest. Sometimes gardening has to happen when life allows for it, but being able to plan ahead with the calendar helps keep things moving at a good pace and keeps motivation high.
How was the calendar developed, are the influences the planets ever explained in depth? I find this subject intriguing, how long have you been practicing biodynamics? I see that you've been using the calendar for a few years, so are you fully embracing biodynamics, or using a combination of techniques?