February
SuMoTuWeThFrSa
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567891011
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"In every country, dogs bite."
You can put both HTML controls and ASP.NET server controls into HeaderTemplate and FooterTemplate.

In this example the header template has an HTML image control that changes every time the season changes, while the footer template displays a different proverb for each month as you navigate through months.

If you want to see a more comprehensive use of header and footer please see the AutoPostBack sample.