How do you want it to be sorted?

Lexically by the column content? (your example looks like that)

Sorted by date (1. by month, 2. by day, 3. by year) and it was coincidence, that all dates are on a monday?

moritz already mentioned Text::CSV and sort on the Chatterbox.

I, personally, thought about a solution using DBD::CSV

What's your current problem? To read the docs? To write the code?

What do you expect us the monks to do?

Regards,
Linuxer