Hi Brett!
I did find the issue with the sample code. The dates worked when converted to epoch datetime and then formatted using dateTimeLabelFormats in the xAxis. See below
{
"chart": {
"type": "xrange"
},
"title": {
"text": "Highcharts X-range"
},
"accessibility": {
"point": {
"descriptionFormat": "{add index 1}. {yCategory}, {x:%A %e %B %Y} to {x2:%A %e %B %Y}."
}
},
"xAxis": {
"type":"datetime",
"dateTimeLabelFormats": {
"day": "%Y-%m-%d" //ex- 2016-01-01
}
},
"yAxis": {
"title": {
"text": ""
},
"categories": [
"Prototyping",
"Development",
"Testing"
],
"reversed": true
},
"series": [
{
"name": "Project 1",
"borderColor": "gray",
"pointWidth": 20,
"data": [
{
"x": 1416556800000,
"x2": 1417507200000,
"y": 0,
"partialFill": 0.25
},
{
"x": 1417507200000,
"x2": 1417766400000,
"y": 1
}
,
{
"x": 1418025600000,
"x2": 1418112000000,
"y": 2
},
{
"x": 1418112000000,
"x2": 1418976000000,
"y": 1
},
{
"x": 1418198400000,
"x2": 1419321600000,
"y": 2
}
],
"dataLabels": {
"enabled": true
}
}
]
}