{{ now|date('A a') }} not formatting as expected

[lewisjenkins]

Description

If I do then I get PM which is the expected output.

But if I do {{ now|date('A') }} on the same website then I'm getting p.m. (PM changes to p.m.)

According to the Twig manual, the format specifier is the same as supported by PHP date function.

Therefore, I should be able to use either of the following:

a = Lowercase Ante meridiem and Post meridiem (am or pm)
A = Uppercase Ante meridiem and Post meridiem (AM or PM)

However, in Craft, using either a or A in Twig has the same result - a.m. or p.m. - in lowercase with added periods.

Steps to reproduce

1. Output of = AM am
2. Output of {{ now|date('A a') }} = a.m. a.m.
3. Results are not identical

Additional info

• Craft version: 3.0.12
• PHP version: 7.0.30-0ubuntu0.16.04.1