from datetime import datetime


def validate_calender(calender):
    """
    Helper function build out calender based on current time.

    :param Dict calender: Calender dict
    :return: Updated Calender dict
    :rtype: Dict
    """
    today = datetime.today()
    # Keep looping until the quarter start is after today
    for quarter, value in calender.items():
        if value[0]['start_date'] > today:
            return {quarter: value}