VBA Excel sort range by specific column

I have a table that can contain any number of rows:

As I said it can contain 1 or ∞ rows.

I want to sort range A3:D∞ by the Date cell that is in column B.
How can I do it?

The problem is that I don't know how to select from A3 to the last row.

I think that looping to the last row is not a correct method.

I have got this so far it sorts looks like correct, but the range is hard-coded.
How do I get rid of the hard-coding of the range?

Range("A3:D8").Sort key1:=Range("B3:B8"), _
order1:=xlAscending, Header:=xlNo

Try this code:

Dim lastrow As Long
lastrow = Cells(Rows.Count, 2).End(xlUp).Row
Range("A3:D" & lastrow).Sort key1:=Range("B3:B" & lastrow), _
   order1:=xlAscending, Header:=xlNo

Or this:

Range("A2", Range("D" & Rows.Count).End(xlUp).Address).Sort Key1:=[b3], _
    Order1:=xlAscending, Header:=xlYes