def get_standard_filename(year, month, day):
    """
    Get the "standardized" name of a daily precipitation file, i.e. the name under the
    scheme used for pre-2006 files.
    """
    return 'PRCP_CU_GAUGE_V1.0GLB_0.50deg.lnx.{YEAR:04d}{MONTH:02d}{DAY:02d}.gz'.format(YEAR=year, MONTH=month, DAY=day)