Simply implement the following:
body{
font-family: "Times New Roman", Times, serif;
}
If you want to modify the h1 fonts as well, you can do so by using:
h1{
font-size: 16px;
}
To apply these styles, create a separate CSS file and place it after the bootstrap CSS:
<link rel="stylesheet" href="../css/bootstrap.css">
<!-- Custom CSS -->
<link href="css/clean-blog.min.css" rel="stylesheet">
<link rel="stylesheet" href="../css/mystyle.css">
Your custom CSS will take precedence over the bootstrap styles defined in your own stylesheet.