I'm setting a personal goal in 2013 to learn a new programming language each month. Obviously, I won't be able to learn any of them in depth, but I plan on completing a small project in each language.

• January: Icon
• February: Go
• March: Common Lisp
• April: Scala
• May: Java (oh the horror!)
• June: Dart
• July: D
• August: Ruby
• September: Groovy
• October: Fortran
• November: Squirrel
• December: Forth

(Scheduled languages subject to change at my whim...)

Edit: 26-Jan, swapped Groovy and Go in February.

Edit: 18-Feb, drop Clojure for Common Lisp, swap Groovy with Lisp in March.

Edit: 1-May, drop Pike for Java (to enable an Android project), move Scala to April.