DateTime

http://msdn.microsoft.com/es-es/library/system.datetime%28v=vs.110%29.aspx

http://www.mikesdotnetting.com/article/23/date-formatting-in-c (opciones de cadena de formato)

https://msdn.microsoft.com/en-us/library/8kb3ddd4(v=vs.110).aspx

https://msdn.microsoft.com/en-us/library/az4se3k1(v=vs.110).aspx


Si se quiere dia, mes, año:
dataGridView4[1, 1].Value = ReporteArray[0].FechaReporteZ.Date.Day + "/" + ReporteArray[0].FechaReporteZ.Date.Month + "/" + ReporteArray[0].FechaReporteZ.Year;
                         

Si se quiere solamente la hora:
dataGridView4[1, 2].Value = ReporteArray[0].FechaReporteZ.TimeOfDay;


https://docs.microsoft.com/en-us/dotnet/api/system.datetime.date?view=netframework-4.8

https://www.dotnetperls.com/datetime-format

https://tableplus.io/blog/2018/09/ms-sql-server-how-to-get-date-only-from-datetime-value.html

https://www.w3schools.com/sql/sql_between.asp

https://www.youtube.com/watch?v=A7E3EdZpPOU

https://www.mssqltips.com/sqlservertip/5206/sql-server-datetime-best-practices/ (Importante leer)