Four Separating Days (四离日) fall on March 20, June 20, September 22 and December 21. There might be some +/- depending on the season (节气). These day also coincide with ‘Yule’, ‘Ostara’, ‘Lithia’, ‘Mabon’ in Wicca – Wheel of the Year.
These days should not be used for any important personal activities or endeavours. But can be used for commencement of legal separation action or to end a relationship.