Android 4.2 is Missing December
Google has acknowledged an issue with Android 4.2 which causes some applications running the latest software update to miss out the month of December. The issue has been found on a number of devices with different apps, but the most common application with the problem is the default People/Contacts app.
Thankfully, Google are usually quite quick at issuing bug fixes compared to their competitors, so it shouldn’t be long before Christmas is restored to new Nexus owners.
Source: Huffington Post