Safari, IE11, Edge display/render data issue.

[simondavies]

Ok i have this all working and all good (well done nice)...

But then i go to check site in Safari and IE 11 and Edge and the event data is not displaying.

take a look at the following version of your demo.
https://codesandbox.io/s/3qvy2zp28m

I have simply added one data item so test.

<vue-calendar
     :events="data"
      ......... rest of code
  ></vue-calendar>

export default {
  name: "HelloWorld",
  data() {
    return {
         data: [{ start: "2018,04,14", title: "11:30 am" }]
.....

No in chrome and FF it displays ok, but in IE11, Edge and Safari the date does not display at all.

It looks like its not being rendered as at.