Ex Date / Ex Dividend Date
Definition - What does Ex Date / Ex Dividend Date mean?
Ex Date / Ex Dividend Date is the first day when purchasers of a security will no longer be entitled to receive a previously declared dividend.
Testopedia explains Ex Date / Ex Dividend Date
When a corporation declares a dividend for payment to shareholders it must set a date for which owners are entitled to receive the dividend. This date is known as the record date. Based on the record date FINRA will set the ex dividend date as two bushiness days prior to the record date.