Thinking in this way, Lord Kṛṣṇa immediately picked up Govardhana Hill with one hand, exactly as a child picks up a mushroom from the ground. Thus He exhibited His transcendental pastime of lifting Govardhana Hill. Lord Kṛṣṇa then began to address His devotees, "My dear brothers, My dear father, My dear inhabitants of Vṛndāvana, you can now safely enter under the umbrella of Govardhana Hill, which I have just lifted. Do not be afraid of the hill and think that it will fall from My hand.
"My dear Lord Śiva, I accept your statements, and your desire for Bāṇāsura is also accepted by Me. I know that this Bāṇāsura is the son of Bali Mahārāja, and as such I cannot kill him because that is My promise. I gave a benediction to King Prahlāda that all the demons who would appear in his family would never be killed by Me. Therefore, without killing this Bāṇāsura, I have simply cut off his arms to deprive him of his false prestige.
O Lord, no one can understand Your transcendental pastimes, which appear to be human and so are misleading. You have no specific object of favor, nor do You have any object of envy. People only imagine that You are partial. —Śrīmad-Bhāgavatam 1.8.29 Prayers by Queen Kunti
Lord Krishna appeared in this world on 19th July 3228 BC (or 8th day of the dark half of the month of sravan or in Rohini Nakshatra, 8, 63,874 years 4 months 20 days of Dwapar Yuga). Shree Krishna married Princess Rukmani- Laxmi . Lord Krishna manifested His earthly pastimes for 125 years. He returned to Spiritual world on 18th Feburary 3102 BC and this is the date of the start of Kaliyuga- the current age (millennium which lasts for 4,32,000 years).