Calvin Harris (40 years old)
Jan 17 Scottish DJ, singer-songwriter and producer ("I'm Not Alone; "We Found Love"), born in Dumfries, Scotland
- Jan 18 Benji Schwimmer, American dancer and choreographer (So You Think You Can Dance), born in Newport Beach, California
- Jan 18 Kristy Lee Cook, American country singer (American Idol, season 7), born in Seattle, Washington
- Jan 20 Toni Gonzaga, Filipino singer and actress, born in Rizal, Philippines
- Jan 24 Witold Kiełtyka, Polish drummer (Decapitated), born in Krosno, Poland (d. 2007)
- Jan 30 Kid Cudi [Scott Mescudi], American rapper (Man on the Moon: The End of Day), born in Cleveland, Ohio
About January 1984
How Old? 40 years old
Generation: Millennial
Leap Year: Yes