If you ask me, for a normal retail player that only intends to buy, collect dividend, sell, with mix of the three in any sequence, then just remember:
- if you want to get the next dividend/entitlement to be paid out, BUY the shares latest one day before the Ex-Dividend/entitlement date.
- if you want to get the next dividend/entitlement to be paid out on a share you own but are going to sell, SELL the shares earliest on the Ex-dividend/entitlement date.
Just relate the Ex-Date against the day you buy/sell shares. That's sufficient. We can call it the 'economics calender' of the shares.
Entitlement refers to things like scrip distributions, rights issuance, and any other stuffs the bankers can think of to confuse the investors.
Shri's table, the settlement dates, the record date, the book closure date, these generally follows the actual 'physical calender' of the shares. Don't match your economics days against your physical days. They are not suppose to.
Its quite a bunch of technical jargons, but there are reasons traditionally the exchanges put consideration into these stuffs e.g. failed settlement (if the seller doesn't have shares to deliver), short sales (e.g. you short-sell shares that are entitled to dividend but return shares later that is ex-entitlement)....