Google Nexus 4 and Nexus 7 get bug-squashing Android 4.2.1 Jelly Bean update
The problem affected those who upgraded to version 4.2 of Android Jelly Bean. Users who tried to enter in a December birthday or anniversary in the People app were out of luck; it skipped right from November to January. It did not affect the Calendar app.
HTC One X Android Jelly Bean update hits UK
HTC One X Android 4.1 Jelly Bean rollout goes global
HTC rolls out Android 4.1 update for One X globally