Filtering records on Today date

Hello, Everyone!
I’m facing with the strange issue on retreving records on Today Date.
Please help me with my issue.
I’m gonna filter records on this:
$filtered_row = $airtable->getContent( ‘Invoiced’, [‘filterByFormula’ => “IS_SAME({LastModifiedTime}, ‘. $today_date .’)”]);

In other words, I’m gonna compare the “LastModifiedTime” field in record with today date.

How can I do this?