Buying a share doesn't mean you own the share. That process of...

Buying a share doesn't mean you own the share. That process of ownership takes at least 2 full business days in a share registry.

You must OWN the share to be entitled.

Here is the definition of the ex date according to google - The ex-dividend date is the date after which people buying shares would not be entitled to the dividend. The ex-dividend date is usually 2 days prior to the record date in order to give the custodian time to register all new shareholders. If you buy shares prior to the ex-dividend date, you will receive the dividend.

Hope that makes sense and shows that sellers today are still entitled to the issue and buyers today are not entitled to the issue.