Already reported below. And from the instructions it should switch to 'A'

Miss test to switch from 'Z' to 'a'

PHP translation kumited! Please review.

This is a duplicate to all the letter shift/caesar ciphers.

Correct. This has been fixed.

( By disabling only sqrt and pow from Math. )

I think there is a blank space after the value that you are returning.

Coffescript Translation Kumited! please accept :D

Java translation Kumited! please accept :D

nice work!

I have also got the same problem with this approach. Use setFullYear() instead of new Date().

Also failing this test - not sure why

There is a test case for upper letter Z missing.

Input: Quick brown fox jumps over the lazy dog ,
Expected Output: Rvjdl cspxo gpy kvnqt pwfs uif mbaz eph ,
Actual Output: Rvjdl cspxo gpy kvnqt pwfs uif mbаz eph

so expected output and actual output are identical, why it gives me an error?
all test cases work out fine, but this.
Is it some bug?

Either tests are broke or I am missing something.

Any ideas?

letterChange
JavaScript
Input: JavaScript , Expected Output: KbwbTdsjqu , Actual Output: KbwbTdsjqu
Quick brown fox jumps over the lazy dog
Input: Quick brown fox jumps over the lazy dog , Expected Output: Rvjdl cspxo gpy kvnqt pwfs uif mbaz eph , Actual Output: Rvjdl cspxo gpy kvnqt pwfs uif mbaz eph
Computer Programming
Input: Computer Programming, Expected Output: Dpnqvufs Qsphsbnnjoh , Actual Output: Dpnqvufs Qsphsbnnjoh
affectioned
Input: affectioned, Expected Output: bggfdujpofe , Actual Output: bggfdujpofe
As Thou List
Input: As Thou List, Expected Output: Bt Uipv Mjtu , Actual Output: Bt Uipv Mjtu
Julius Caesar
Input: Julius Caesar, Expected Output: Kvmjvt Dbftbs , Actual Output: Kvmjvt Dbftbs
Romeo and Juliet
Input: Romeo and Juliet, Expected Output: Spnfp boe Kvmjfu , Actual Output: Spnfp boe Kvmjfu
King Henry IV
Input: King Henry IV, Expected Output: Ljoh Ifosz JW , Actual Output: Ljoh Ifosz JW
King Lear
Input: King Lear, Expected Output: Ljoh Mfbs , Actual Output: Ljoh Mfbs
MACBETH
Input: MACBETH, Expected Output: NBDCFUI , Actual Output: NBDCFUI