Grid Lines

If you mean the grid cells starting and ending at 12:00 (noon) instead of 00:00 (midnight) then this is implemented using a custom timeline feature:

https://doc.daypilot.org/scheduler/timeline/

It's not described in the tutorial text but you can implement it like this (see Page_Load method in Default.aspx.vb):

DayPilotScheduler1.Scale = TimeScale.Manual
Dim start As New Date(Date.Today.Year, 1, 1, 12, 0, 0)
Dim [end] As Date = start.AddYears(1)

DayPilotScheduler1.Timeline.Clear()
Dim cell As Date = start
Do While cell < [end]
  DayPilotScheduler1.Timeline.Add(cell, cell.AddDays(1))
  cell = cell.AddDays(1)
Loop

This solution didn't work for me. I tried with many alternatives also.
Please let me know the exact solution if you can give.

Thanx in Advance.