On January 6, 1850, C.H. Spurgeon was converted.
Here are the details as I recall them from chapter 7 of "The Early Years":
Spurgeon was heading to a particular place of worship but was hindered by a snowstorm. He turned into a side street and came to a Primitive Methodist Chapel. There were about 15 people and the normal preacher could not be there due to the snow. A layman stood to peach and Spurgeon says, "He was obliged to stick to his text, for the simple reason that he had little else to say." His text was "Look unto Me, and be ye saved, all the ends of the earth." He preached for about 10 minutes and then pointed at Spurgeon and made some comments about his personal appearance and told him to "Look" to Christ. Spurgeon says, "Oh! I looked until I could almost have looked my eyes away."