This name too has come many times in the Qura’n. The number of those verses is thirteen. Maliki Yom-ud-din means that He (God) is the ruler of the day of rewards.
(Some linguists say that the main word “Din” means humility, obedience and subservience and if this word denotes rewards then it is so because we have to be Obedient and humble before Him or because rewards are the result of obedience.)
Some have taken it to mean the Day of accounting also. This is to specify the effect of the cause, because accounting precedes rewards.