Chinese omitted 30th day, today regarded as 1st lunar of 5th Chinese month in which case it is Tiger, Li, Green 4. M-T-K 30th, Ox, Khon, Blue 3. Today is the anniversary of Terton Sangye Lingpa (14th century). I personally wouldn't hang prayer flags today (or tomorrow either). Don't you just love it when the Chinese and Tibetan calendars go out of synch? This is not a particularly auspicious day as things go... best to take a deep breath and get ready for Saga Dawa, which starts tomorrow.