You could use dynamic classes in the appearance tab of your date / text, where you could put something like
if $currentObject/dateAttribute < [%BeginOfCurrentDay%] then 'text-danger' else ''
Make sure the class text-danger does what you want, or use another class that suits your styling or one that creates a red border or whatever.
Hi Megan Head,
Use the below widget,
https://marketplace.mendix.com/link/component/106254