This gets the today date in a format you want.
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1; //January is 0!
var yyyy = today.getFullYear();
if(dd<10) {
dd = '0'+dd
}
if(mm<10) {
mm = '0'+mm
}
today = mm + '/' + dd + '/' + yyyy;
console.log(today);
Then you can use that date to set a filter on your Data Collection just make sure it uses the same format in your Data Collection as you create in the code above.