Why is the $stdout different when using a uppercase variable compared to a lowercase variable?

Question

I dont understand why %u != %U, %v != %V, and %w != %W. Can anyone help me understand whats going on here?

https://code.sololearn.com/cDuAuwDXtbzG/?ref=app

Answer 1

Because they are different format specifiers.

https://www.shortcutfoo.com/app/dojos/ruby-date-format-strftime/cheatsheet

Answer 2

Thanks for clarifying, ChaoticDawg.