The easiest way to learn the practice of Gayatri upasana (a certain prescribed method for approaching Gayatri Goddess), is through the Gayatri mantra yoga. Description from gayatri-mantra-download.com. I searched for this on bing.com/images
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).