TRANSLATION

"If in a kalpa a suitable living entity is not available to take charge of Brahma's post, the Supreme Personality of Godhead Himself personally expands and becomes Lord Brahma.

One day of Brahma consists of the four yugas multiplied a thousand times-or, according to solar calculations, 4,320,000,000 years-and such also is the duration of his night. One year of Brahma's life consists of 360 days and nights, and Brahma lives for one hundred such years. Such is the life of a Brahma.