The problem is that you are depending on browsers to parse your date strings, but they can do it differently. It is much more reliable to use the numeric format like this: new Date(2016, 8, 15). Note that the month index starts at 0, so month 8 is September.
Here is your code slightly fixed up in a jsfiddle: https://jsfiddle.net/dlaliberte/z0n8uep7/ -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-visualization-api. To view this discussion on the web visit https://groups.google.com/d/msgid/google-visualization-api/885704a1-5432-4ac9-afd3-6d67fe760e17%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
