January 6, 1886: Charles Augustus Milverton called upon Holmes at 221B Baker Street. [CHAS]
January 6, 1888: Jack Douglas shot and killed Ted Baldwin. [VALL]
January 6, 1903: Colonel Emsworth told James Dodd that he must leave Tuxsbury Old Park the next morning. [BLAN]
And the most IMPORTANT:
Friday, January 6, 1854: Sherlock Holmes was born!