What's the most amount of hours you've spent on your Wii U in a single month?

[HylianYoshi]

The thread title. Answer it. Also give the month and what you used the most on your Wii U in that month (could be a game, app, etc). All of this information can be found in your Wii U Daily Log.

353 hours and 9 minutes in April of 2014 for me, with the most used item being the Internet Browser.