The scriptures on Dharma have given high priority to daily rituals. Dinacharya is planned such that a man remains healthy all his life and without any illness. The health of an individual depends upon his diet, exercise and actions. Thus, Dinacharya is important from the perspective of health. If Dinacharya is in harmony with the laws of Nature, then man will benefit and not get distressed. Hence, it is necessary to behave in harmony with Nature (as advised by Dharma); for example, waking up early in the morning, rinsing the mouth, cleansing the teeth, bathing etc.
All karmas right from waking up in the morning till retiring to bed at night are included in Dinacharya.