Copy a variable number of rows and columns to last row of another worksheet

I have what I think is a simple problem, but I have not been able to find a satisfactory solution in the forum yet.

I have a workbook with several worksheets, one worksheet is called Monthly Data. I need to copy all the data from Monthly Data beginning with row 2 to another Worksheet called YTD Data, beginning after the last filled row. Monthly Data has a variable number of Rows and Columns. There is a header in Row 1 with a title for each column.

Doesn't seem too complicated but have found no solution that fits this scenario exactly. Any help would be greatly appreciated.

John