Enqueued jQuery not working

Someone answered, but the answer has since disappeared, which is a shame because it lead me to the solution. What ended up working was

jQuery(document).ready(function ($) {
    setTimeout(function () {
        $('div.edit-post-post-schedule span').text('Birth Date');
        $('div.edit-post-post-schedule span').css('font-weight','bold');
    }, 250);

});

I’m still a bit fuzzy on why it worked, but I will take the win!