我基于google visualization api创建了一个仪表板（表格，一些图表）。我用JSON提供谷歌api，但一切正常，直到我尝试添加DATE格式。
现在我有了这种JSON格式：
{"cols":[{"label":"ID","type":"number"},{"label":"Masina","type":"string"},{"label":"Model","type":"string"},{"label":"Godina proiz","type":"date"},{"label":"Datum prve reg","type":"date"},{"label":"Reg br","type":"string"},{"label":"Istek reg","type":"date"},{"label":"Snaga","type":"number"},{"label":"Kapacitet","type":"number"},{"label":"Servis","type":"date"},{"label":"Trajna reg","type":"string"},{"label":"Vlasnistvo","type":"string"}],"rows":[{"c":[{"v":1},{"v":"traktor"},{"v":"IMT"},{"v":"510-td"},{"v":"\/Date(2014,07,07)\/"},{"v":"\/Date(2014,02,27)\/"},{"v":"BG-657 UI"},{"v":"\/Date(2014,04,24)\/"},{"v":55},{"v":57},{"v":"\/Date(2014,02,18)\/"},{"v":"licno"}]}]}
但谷歌说：
One or more participants failed to draw()×
我尝试了这么多解决方案，但又一次没用？
为什么谷歌可视化不接受这个：
{"v":"\/Date(2014,02,27)\/"}