Markus Gesmann

Works for me with Safari 8.0.5

How strange, I have no problems with the same system. Could it be country/language specific? I am using a UK/English set up.

Strange, the same HTML output renders fine with my browser (Google Chrome, Windows 7, UK). What happens if you modify the example from the Google documentation and include data for...

I suggest you ask a question on the Google Chart API forum: https://groups.google.com/forum/#!forum/google-visualization-api

Try and test the version of googleVis on GitHub. I added a new function called gvisGantt.

I have added 'datetime'. Please try again with the GitHub version of googleVis. Perhaps, you can contribute a minimal 'datetime' example?

Not sure, how this work. Your code generates the following output:  The [Google documentation](https://developers.google.com/chart/interactive/docs/gallery/ganttchart#data-format) seems to suggest that only date formats are allowed for the start and end date,...

Allowing for 'datetime' throws an error from the Google Chart API 

I see now a date can have hours and minutes too. I added a step where 'datetime' variables are replaced as 'date' variables. Now I get the following output: 

I am sure it is possible, but I haven't got the time at the moment to look into this.