Hi Halit,
Greetings from Syncfusion.
When we set the valueType as DateTime, the
interval gets calculated from the 12 hours of a day. But in the provided
sample, the value is 5 hours and 30 minutes. So the label gets rendered based
on that value. Please find the below screenshot for your reference.

To achieve your requirement, you can set the valueType
as DateTimeCategory. Please find the below modified sample link for your
reference.
Sample link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/chart54410009
Code Snippet:
|
primaryXAxis: {
valueType:
'DateTimeCategory',
intervalType: "Days",
labelFormat: "dd, MMM, yyyy / hh: mm: ss",
labelPlacement: "onTicks"
},
|
Screenshot:

Kindly, revert us if you have any concerns.
Regards,
Swetha