On the month of Phālguna, the full-moon day, the full-moon night is the appearance, or tithi, or occasion, for Lord Caitanya. Lord Caitanya appeared on the phālguni pūrṇimā. Pūrṇimā means full moon, and phālguni means the month which is called Phālguna, which is calculated from 15th February to 14th March.
So after the appearance of Lord Caitanya, there was great ceremony, all the inhabitants of Navadvīpa. His father, Lord Caitanya Mahāprabhu's father, was not very rich man but was very respectable brahmin. The brahmin community, especially in those days, five hundred years ago, the brahmin community . . . as a community they were not very rich, because they did not care for material opulence. That is the specific quality of brahmins.
There are four classes of men all over the world.
(break) . . . people, they are interested for success of this human form of life. They are called brahmin. And the next class of men, they are interested for political power, next important class. First important class men is called who are seeking success of the human form of life, and the next class, they are seeking success to become very rich within this material world by political power. Another, next class, is trying to be successful by material opulence, by earning money, the mercantile community. First class, second class, third class. They are third class.
And the fourth-class men, they are called śūdras. That means they have no other ambition than to fill up their belly only. That's all. They have no intelligence to become brahmin, neither to become kṣatriya, administrator, or to occupy political powers; neither they have energy to become very rich businessmen or industrialists. Therefore they are called fourth-class men.