<p dir="auto">From the documentation on <a href="https://material-ui.com/layout/grid/#full-width-vs-centered" rel="nofollow">Full-width vs Centered</a>, both example look pretty much the same (except for different column size for child items but I don't think that's what "full-width" and "centered" are about, correct me if I'm wrong).</p>
<p dir="auto">AFAIK, full-width &amp; centered are equivalent of <a href="https://getbootstrap.com/docs/4.0/layout/overview/" rel="nofollow">Bootstrap's</a> <code class="notranslate">container-fluid</code> and <code class="notranslate">container</code>, right?</p>

<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> I have searched the <a href="https://github.com/callemall/material-ui/issues">issues</a> of this repository and believe that this is not a duplicate.</li>
</ul>
<h2 dir="auto">Expected Behavior</h2>
<ul dir="auto">
<li>Examples should look significantly different between Full-Width and Centered (see <a href="https://getbootstrap.com/docs/4.0/layout/overview/" rel="nofollow">Bootstrap</a>)</li>
<li>Documentation should specify which part of the code is responsible for full-width and centered</li>
</ul>
<h2 dir="auto">Current Behavior</h2>
<ul dir="auto">
<li>I don't think the example is correct</li>
</ul>
<h2 dir="auto">Steps to Reproduce (for bugs)</h2>
<ul dir="auto">
<li>Just copy the code for Centered Grid from <a href="https://material-ui.com/layout/grid/#full-width-vs-centered" rel="nofollow">https://material-ui.com/layout/grid/#full-width-vs-centered</a> on to your project, you don't see any effects that would be considered "centered"</li>
</ul>
<h2 dir="auto">Context</h2>
<ul dir="auto">
<li>Just got confused by the documentation. I think the examples need to be updated.</li>
</ul>
<h3 dir="auto">Problem description</h3>
<p dir="auto"><strong>Only on Firefox</strong>, day 2016-10-16 is missing  and day 2016-10-15 is duplicated. Actually, it seems like the October month, in every year, has a pair of missing/duplicate days. Examples:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/a1e5bb185795000aa953afacaab216a514b823b2273a24d340363070feca2fa0/68747470733a2f2f692e6779617a6f2e636f6d2f65316165333666336266363735663461643932303632336637623166363637302e706e67"><img src="https://camo.githubusercontent.com/a1e5bb185795000aa953afacaab216a514b823b2273a24d340363070feca2fa0/68747470733a2f2f692e6779617a6f2e636f6d2f65316165333666336266363735663461643932303632336637623166363637302e706e67" alt="" data-canonical-src="https://i.gyazo.com/e1ae36f3bf675f4ad920623f7b1f6670.png" style="max-width: 100%;"></a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/7379a4170fd355b892ea71ab350e6ea994ba2b5a781737d116fb4333025a71ad/68747470733a2f2f692e6779617a6f2e636f6d2f66633139376536393862353733383265623330313365313630653138656231392e706e67"><img src="https://camo.githubusercontent.com/7379a4170fd355b892ea71ab350e6ea994ba2b5a781737d116fb4333025a71ad/68747470733a2f2f692e6779617a6f2e636f6d2f66633139376536393862353733383265623330313365313630653138656231392e706e67" alt="" data-canonical-src="https://i.gyazo.com/fc197e698b57382eb3013e160e18eb19.png" style="max-width: 100%;"></a></p>
<h3 dir="auto">Link to minimally-working code that reproduces the issue</h3>
<p dir="auto">Well, you can just go to <a href="http://www.material-ui.com/#/components/date-picker" rel="nofollow">http://www.material-ui.com/#/components/date-picker</a> and check it out. <strong>Remember to test on Firefox</strong>.</p>
<h3 dir="auto">Versions</h3>
<ul dir="auto">
<li>Material-UI: 0.15.4, but as you can see the website is also bugged</li>
<li>React: 15.3.2, but the website...</li>
<li>Browser: Tested on chrome and firefox, only firefox has problems. Chrome works correctly.</li>
</ul>