How to correctly check if a toggleButton is currently selected on Chrome console using jQuery commands?

There’s this page that displays the economic calendar for Today by default:

enter image description here

I’m trying to find a jQuery method that returns true or false depending on weather the toggleButton called Today is currently selected.

I tried the following method on Chrome Console:

$('#timeFrame_today').is(':selected')

And it returned:

false

Which should not be the case since as I mentioned, the #timeFrame_today button (a.k.a. Today) is selected by default, so I’m lost here.