Charlie Munger had a big birthday party planned for New Year's Eve when he would have turned 100 years old

• Charlie Munger, Warren Buffett's right-hand man at Berkshire Hathaway, died at age 99 on Tuesday. 
• He had planned his birthday party which would have fallen on New Year's Eve, according to CNBC. 
• The investing legend had an active social life in his old age which he said he "welcomed." 

Charlie Munger, Berkshire Hathaway's vice chairman and investing legend, had plans in place for his birthday on New Year's Eve when he would have turned 100 years old, CNBC reported Tuesday.

CNBC's Becky Quick said on "Closing Bell Overtime" that the publication had been trying to put together a package for his upcoming birthday in five weeks.