Comparing current date/time to current date doesn't work

Here's the code:

bool test.datetest()
{
    start_date = zoho.currentdate;
    end_date = zoho.currentdate;
    current_date_time = zoho.currenttime;
    test = false;
    if (current_date_time >= start_date && current_date_time <= end_date) {
        test = true;
    }
    return test;
}

I thought this should return true since the current_date_time has a date that is equal to the start_date and end_date, but instead it returns false. Why doesn't this return true?

If I change the end_date to be one day in the future (zoho.currentdate.addday(1)), then it returns true. Shouldn't the above code return true?