SSRS Report expressions : label, page number , date

Label is SSRS Expression
=Labels!@SM_Purchase:RecievedDate

Using labels for dynamic texts 
=System.String.Format(“This is a label id converted at run time {0}”, Lables!@SYS1560);
=System.String.Format(Lables!@ABC123, myTable.Field.Value);

page number
="Page " & Globals!PageNumber +" of " & Globals!TotalPages

current date and time
=Format(Now(), "dd/MM/yyyy hh:mm tt")

=Format(Now(), "dd/MM/yyyy") only date
=Format(Now(), "hh:mm tt") only time
 
="Report generation date:  " & Format(Globals!ExecutionTime,"dd/MM/yyyy  h:mm:ss tt" )
=Report Generation Date: " & FORMAT(Cdate(today), "dd-MM-yyyy")

https://docs.microsoft.com/en-us/sql/reporting-services/report-design/expression-uses-in-reports-report-builder-and-ssrs?view=sql-server-ver15