From All Sheets to Master Sheet
Array Version
Sub AllSheetsToMaster()
  Const cMaster As Variant = "Master"   ' Master Worksheet Name/Index
  Const cSearch As String = "2019"      ' Search String
  Const cFirstR As Long = 1             ' Source First Row Number
  Const cFirstC As Variant = 1          ' Source First Column Letter/Number
  Dim vntS As Variant   ' Source Array
  Dim vntC As Variant   ' Count Array
  Dim vntT As Variant   ' Target Array
  Dim LastUR As Long    ' Source Last Used Row Number
  Dim LastUC As Long    ' Source Last Used Column Number
  Dim LastR As Long     ' Target Last Used Row Number
  Dim x As Long         ' Worksheet Counter
  Dim i As Long         ' Source Array Row Counter
  Dim j As Long         ' Source/Target Array Column Counter
  Dim k As Long         ' Target Array Row Counter
  For x = 1 To ThisWorkbook.Worksheets.Count ' Worksheets
    ' From Source Worksheet to Source Array.
    With ThisWorkbook.Worksheets(x)
      ' Check if current worksheet name is th same as Master Worksheet Name.
      If .Name = cMaster Then GoTo NextWorksheet
      ' Check if current worksheet is empty.
      If .Cells.Find("*", .Cells(.Rows.Count, .Columns.Count), -4123, , 1) _
          Is Nothing Then GoTo NextWorksheet
      ' Calculate Last Used Row and Column in current Source Worksheet.
      LastUR = .Cells.Find("*", , , , , 2).Row
      LastUC = .Cells.Find("*", , , , 2, 2).Column
      ' Copy current used range to Source Array.
      vntS = .Range(.Cells(cFirstR, cFirstC), .Cells(LastUR, LastUC))
    End With
    ' From Source Array to Count Array.
    ' Count Array cannot be bigger than Source Array.
    ReDim vntC(1 To UBound(vntS))
    k = 0 ' Reset Target Array Row Counter!!!
    For i = 1 To UBound(vntS) ' Rows
        For j = 1 To UBound(vntS, 2) ' Columns
            If vntS(i, j) = cSearch Then
                k = k + 1 ' Increase Target Array Row Counter.
                vntC(k) = i ' Write Source Array Row number to Count Array.
                Exit For ' Stop checking as soon as found.
            End If
        Next
    Next
    ReDim Preserve vntC(1 To k) ' Resize Count Array (make it smaller).
    ' From Source Array to Target Array.
    ' Resize Target Array to the Count Array rows and Source Array columns.
    ReDim vntT(1 To k, 1 To j)
    For i = 1 To k ' Rows
        For j = 1 To UBound(vntS, 2) ' Columns
            vntT(i, j) = vntS(vntC(i), j) ' Write to Target Array.
        Next
    Next
    ' From Target Array to Target Range.
    With ThisWorkbook.Worksheets(cMaster)
      ' Calculate Target Last Used Row Number.
      If Not .Cells.Find("*", .Cells(.Rows.Count, .Columns.Count), -4123, , 1) _
              Is Nothing Then LastR = .Cells.Find("*", , , , , 2).Row
      ' Copy Target Array to Target Range.
      .Cells(LastR + 1, cFirstC).Resize(UBound(vntT), UBound(vntT, 2)) = vntT
    End With
NextWorksheet:
  Next
End Sub