my first linked website

Indent you code, so he's more easily readable/editable...

Well so:

with indentation, you can better see a problem of spared closing </a> tag...
the 'sytle' attribute of <a> tag is unnecessary ( but not a problem: it do just nothing )
the attributes in tags are to be avoided if they can be replaced by css rules ( and your first mistake is in attribute 'align' of your <p> tag, where you set the 'centre' value instead the correct 'center' ;) )
well, because we fix the previous error, no more necessary to use <center> tag or even to replace it with a <div> with a centered text alignment ^^
finally, we can also retrieve the <b> and <i> deprecated tags, for style our link with css rules :)

Your code was:

<p align="centre"><b><i><center><a style="text-align:center;" href="https://www.brainyquote.com/quotes/keywords/good_day.html" target="_blank">best quotes</a></center></b></i></a></p>
<hr width="260px"/>
<hr width="160px"/>

And now, the code is:

<style>
    .myclass { text-align:center; }
    a { font-weight:bold; font-style:italic; }
    hr { margin:unset auto; } /* center align <hr> if not full width sized */
    #sep1 { width:260px; }
    #sep2 { width:160px; }
</style>
<p class="myclass">
    <a href="https://www.brainyquote.com/quotes/keywords/good_day.html" target="_blank">
        best quotes
    </a>
</p>
<hr id="sep1"/>
<hr id="sep2"/>
</body>

my first link (^_^) [refactoring] [@Tushar Kumar ]