Hi Elros, good that you are back. I've been very busy myself too...
I also use Liu Yao for date selection of important events. If we can predict the auspiciousness of a certain action, then the time for that action is also implied.
I agree with Dao that one hexagram is just enough for your query. It's also more difficult for the diviner (interpreter) to analyze four times instead of once, isn't it?
Anyway, looking at the hexagrams, July is not a good month because of Fu Yin. Sixth Self line is Fu Yin, and Fifth line too. Yes, in Liu Yao, we do have the Fu Yin structure just like Bazi, but the application and meaning is a bit different.