Setting time format

https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings

https://stackoverflow.com/questions/57166239/xamarin-how-to-display-current-date-and-time-on-a-label-how-to-access-the-cloc

https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings

if you want a constantly updating time, use a Timer

System.Timers.Timer timer = new System.Timers.Timer(1000);
timer.Elapsed += TimerElapsed;
timer.AutoReset = true;
timer.Start();

private void TimerElapsed(Object source, ElapsedEventArgs e)
{
    myLabel.Text = e.SignalTime.ToString();
}

if you want to use databinding, have your elapsed event update the ViewModel property that your label is bound to instead of directly updating the Label

• 
  If you type string currentDate = DateTime.Now.ToString()
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