DateFormat

public DateFormat DateFormat { get; set; }

var project = new Project();

// initialize a timeline view
var view = new TimelineView();

// set a value indicating how to format dates on the Timeline view.
view.DateFormat = DateFormat.DateDddDd;
// set a value indicating whether to display overlapped tasks on multiple rows.
view.DisplayOverlapped = true;
// set a value indicating whether to show pan and zoom control.
view.ShowPanZoom = true;
// set a value indicating whether to show timescale.
view.ShowTimescale = true;
// set a value indicating whether to display a line representing today.
view.ShowToday = true;
// set a value indicating how many lines are used to display task in a timeline.
view.TextLinesCount = 2;

// gets a value indicating whether to display overlapped tasks on multiple rows.
Console.WriteLine("Show Dates: " + view.ShowDates);

// add the view to the project
project.Views.Add(view);

// add some test data to project
var task1 = project.RootTask.Children.Add("Task 1");
task1.Set(Tsk.Start, new DateTime(2020, 4, 29, 8, 0, 0));
task1.Set(Tsk.Duration, task1.ParentProject.GetDuration(24, TimeUnitType.Hour));
var task2 = project.RootTask.Children.Add("Task 2");
task2.Set(Tsk.Start, new DateTime(2020, 4, 29, 8, 0, 0));
task2.Set(Tsk.Duration, task1.ParentProject.GetDuration(40, TimeUnitType.Hour));

project.Save(OutDir + "SetTimeScaleCount_out.pdf", SaveFileFormat.Pdf);