As derived from working history.xml file, 2018-07-30.
It appears there must be a space between the = and the " on a parameter!!! No-- this file worked!
Forbidden characters in data:
< > & ' "
Description: doesn't do anything.
No quotation marks within comment sections, especially in caption and title!
Example:
<event
start= "2017-09-09"
end= "2017-09-16"
title= "At cottage near Frontenac."
description= "Cottage with Paul, Laetitia, Danielle, Olive and Kermit."
image= "images/2017/thumbs/2017-09-14-cottage.jpg"
link= "images/2017/fullsized/2017-09-14-cottage.jpg"
icon= "icons/dark-red-circle.png"
color= "red"
textcolor= "green">
Our annual week at the cottage with the family, except for Christopher.
</event>
Date Here