Individually styling date month year [closed]

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As suggested, you can break down the date format in different parts.

echo '<span class="date-day">' . get_the_date( 'd' ) . '</span>';
echo '<span class="date-month">' . get_the_date( 'M' ) . '</span>';
echo '<span class="date-year">' . get_the_date( 'Y' ) . '</span>';

Now each item have class associated with it, so you can style each differently as you require.