Calendar backgrounds

[mankir]

Let's collect pictures, which could be used as calendar backgrounds. These pictures should be under a free license or public domain and match a season (in which month it could be used):
http://www.students.uni-mainz.de/mkirsch/N900/winter.jpg
Source: Wikimedia (public domain), should be used for winter...

[lidow]

Nice picture :)

How I can change those backgrounds? I can see that the theme is changing it somehow.

[mankir]

pics are located in THEME/backgrounds/qgn_calendar_bg_MONTH
http://www.students.uni-mainz.de/mkirsch/N900/autumn.jpg
Source: Wikimedia (GFDL by Martin Heiß), should be used for autumn...

[mankir]

These ones are nice:
http://www.goodfon.com/image/88571-800x480.jpg
http://www.goodfon.com/image/87784-800x480.jpg
http://www.goodfon.com/image/88572-800x480.jpg
http://www.goodfon.com/image/71541-800x480.jpg
http://www.goodfon.com/image/75040-800x480.jpg