There are customs of praying 10 days or 3 days befor Qing Ming in China. Some places also have the custom to pray 10 days or 3 days after the Qing Ming. So, it's ok to do it before 10 days. I checked the date should be March 26th. The Chinese calendar shows it's an auspicious date for sacrific. But the day clashes with the Ox people. Make sure your Chinese zodiac sign is not Ox.
There are customs of praying 10 days or 3 days befor Qing Ming in China. Some places also have the custom to pray 10 days or 3 days after the Qing Ming. So, it's ok to do it before 10 days. I checked the date should be March 26th. The Chinese calendar shows it's an auspicious date for sacrific. But the day clashes with the Ox people. Make sure your Chinese zodiac sign is not Ox.