This Calendar 30 icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,100 icons, all in the same style and quality.
This is a calendar page that is displaying the number thirty. There is no month displayed, nor is there a day. There are, however, what looks like two rings protruding from the top of the page, suggesting that this is a calendar that can be adapted for reuse month after month.