Hello @dancoxdrums
http://drumlessonsinbristol.com/blog-grid/ link specified is Page not found error
please check you page permalink try to off cache and check same.
RECOMMENDED: Tags: is either empty or missing in style.css header.
>> Is can be fixed just correct syntax of tags and tags used in it.
Example Date Time Formate
https://codex.ww.wp.xz.cn/Formatting_Date_and_Time
<?php
$archive_day = get_the_time('d');
?>
<a href="<?php echo esc_url(get_day_link('', '', $archive_day)); ?>" class="icon"><?php echo esc_html(get_the_date('M j, Y'));?></a>
Refer for Custom Headers https://codex.ww.wp.xz.cn/Custom_Headers
Refer for Custom Backgrounds https://codex.ww.wp.xz.cn/Custom_Backgrounds
