New Logo of Yahoo! | Yahoo Logo campaign : 30 Days Of Change
Before the final logo of Yahoo launched, Marissa Mayer : CEO of Yahoo launched one campaign for 30 day in which everyday new logo was published with the campaign name “30 Days Of Change”.
Here are the all logo from very first day to last day for the 30 days and you can see some variations in logo of Yahoo every day. On the 5th September 2013, New logo of Yahoo was released.