Why last 24hrs is displaying 2 days results

Hi,

I created a grafana dashboard when I check for last 24hrs I’m getting 2 days results i.e yesterday and day before yesterday, why.?
Dashboard JSON:

{
“description”: “”,
“fieldConfig”: {
“defaults”: {
“custom”: {
“align”: “center”,
“filterable”: true,
“displayMode”: “auto”
},
“thresholds”: {
“mode”: “absolute”,
“steps”: [
{
“color”: “green”,
“value”: null
},
{
“color”: “red”,
“value”: 80
}
]
},
“mappings”: ,
“color”: {
“mode”: “thresholds”
},
“decimals”: 0,
“min”: -5,
“unit”: “short”
},
“overrides”: [
{
“matcher”: {
“id”: “byName”,
“options”: “Time”
},
“properties”: [
{
“id”: “unit”,
“value”: “time: YYYY-MM-DD”
}
]
},
{
“matcher”: {
“id”: “byName”,
“options”: “Success count”
},
“properties”: [
{
“id”: “unit”,
“value”: “locale”
}
]
}
]
},
“gridPos”: {
“h”: 8,
“w”: 12,
“x”: 0,
“y”: 1
},
“hideTimeOverride”: true,
“id”: 6,
“interval”: null,
“maxDataPoints”: null,
“options”: {
“showHeader”: true,
“frameIndex”: 0,
“sortBy”: [
{
“desc”: true,
“displayName”: “Time”
}
]
},
“pluginVersion”: “7.5.17”,
“targets”: [
{
“exemplar”: true,
“expr”: “sum(increase(authsuccess total{kubernetesnamespace="d3d-prd-d3-prd-w2",app="trusted-collector"}[24h]))", “format”: "time series”,
“hide”: false,
“instant”: false,
“interval”: “1d”,
“legendFormat”: “Success count”,
“refId”: “B”
},
{
“exemplar”: true,
“expr”: “sum(increase(authfailure total{kubernetes_namespace="d3d-prd-d3-prd-w2"}[1d])) by (app)”,
“hide”: true,
“interval”: “1d”,
“legendFormat”: “Failure count”,
“refId”: “A”
},
{
“exemplar”: true,
“expr”: “”,
“hide”: false,
“interval”: “”,
“legendFormat”: “”,
“refId”: “C”
}
],
“timeFrom”: null,
“timeShift”: null,
“title”: “Authentication Success”,
“transformations”: ,
“type”: “table”,
“datasource”: null
}

What is the datasource and can you provide the query that leads to this result?