Anton's Calendar Widget.. really basic.. simple... not many options.. light at 69KB.. I personally love it for the home screen and keeping things at a glance without taking up my screen... I use Pure Grid Calendar for my main calendar widget on another screen..
The icons are from a theme called lunarui. You can just download the icon pack. Just Google "lunarui cm7 theme" and go to the XDA site. From there you will find the link to icons. Must download from computer though.