In what scenarios would it be beneficial to let databases handle date and time operations instead of relying solely on PHP functions like mktime?

When dealing with date and time operations in a database-driven application, it can be beneficial to let the database handle these operations instead of relying solely on PHP functions like mktime. This is because databases have built-in functions for date and time manipulation, which can be more efficient and accurate than using PHP functions. Additionally, by offloading these operations to the database, you can leverage the power of SQL queries to perform complex date calculations and comparisons.

// Example of using MySQL's DATE_ADD function to add 1 day to a date in a SQL query
$query = "SELECT DATE_ADD(created_at, INTERVAL 1 DAY) AS new_date FROM table_name";
$result = mysqli_query($connection, $query);

while ($row = mysqli_fetch_assoc($result)) {
    echo $row['new_date'] . "<br>";
}