I have a small dancer application which serves up some HTML (including the javascript to call the google charts API) and for other URLs queries a database and returns the da
JSON does not support datetime as a data types. But according to Google's documentation, you can just send a string with this format:
JSON does not support JavaScript Date values (for example, "new Date(2008,1,28,0,31,26)"; the API implementation does. However, the API does now support a custom valid JSON representation of dates as a string in the following format: Date(year, month, day[,hour, minute, second[, millisecond]]) where everything after day is optional, and months are zero-based.
Google Chart Tools Datasource Protocol