Variable Cell Reference

I do not simply want to directly add the cells inside Range().  I want to add an integer to "day" and use that to reference day1, day2, day3, etc. which are the different cells to change.  I need it this way so that I can change the number of iterations within the For loop.  For example:

Dim days As Integer

days = 31

Dim day1 As String

day1 = "A1"

Dim day2 As String

day2 = "K2"

Dim day3 As String

day3 = "H7"

Dim day4 As String

day4 = "G4"

..........All the Way to day37 with different cell values......

For k = 1 To days

    Range(day & k).Value = "Hello"

Next k

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In the example (which doesn't work), I want all the cells that are referenced in the day1, day2, day3, all the way to "day & days" to  have the value "Hello".  This way I can change the number of iterations of the For loop by changing the days variable. Also, if I want all I have to do is change the value of day1, day2, etc. instead of having to manually change the cells within Range() in my entire code.