Missing timezone causes post date/times to be UTC 0000 offset

[S0AndS0]

Describe the bug

Date formatting may be reporting the wrong day

• collection-home.html line 9

• collection-home.html line 44

To Reproduce

The S0AndS0/100-days-of-code repository has two collection posts within the linked to ref-hash b540d61b6085baa9207f334c7cb5b2086857ba48

• rounds/_r000/000_bash-date-calculations.md has a date of 2020-04-27 21:08:27 -0700

• rounds/_r000/001_bash-padding-strings.md has a date of 2020-04-28 10:47:52 -0700

When the site is built both posts report the date of Apr 28, 2020 within the collection list page r000.html and each post also reports Apr 28, 2020

HTML snip from /r000.html

<span class="post-meta">Apr 28, 2020</span>

HTML snip from /r000/000-bash-date-calculations/

<time class="dt-published" datetime="2020-04-28T04:08:27+00:00" itemprop="datePublished">Apr 28, 2020</time>

Expected behavior

Dates defined by posts should be presented when site builds with the day defined by FrontMatter

Additional context

Inspecting rounds/_r000/000_bash-date-calculations.md vs. /r000/000-bash-date-calculations/ shows that the time of day is also changing 21:08:27 vs. 04:08:27 respectively.

Adding timezone string to _config.yml file as suggested by jekyll/jekyll#1069 seems to fix this. However, that setting UTC offset within individual posts doesn't seem to be respected should likely be noted somewhere within the ReadMe file of this project.

Example FrontMatter _config.yml snip....

timezone: America/Los_Angeles

[S0AndS0]

Commit 3f1ee5a93dd99cb2eedeaf8b86a55adcb8b43e87 adds timezone notes.