How can I join CSV columns from multiple files using Powershell?

Question

I have the following file month-number.csv:

month-number
1
2
3
4
...

I have the following file month-name:

month-name
January
February
March
April
...

I have the following file month-days:

month-days
31
28
31
30
...

I want my final file to be...

month-number	month-name	month-days
1	January	31
2	February	28
3	March	31
4	April	30
...

How can I achieve this using a Powershell command?

Much thanks.

I've tried multiple online questions but in these questions their CSVs had columns in common or asked for something different