def TimestampUTCToISO8601(timestamp):
 utc_tuple = datetime.utcfromtimestamp(timestamp)
 return ('%0.4d-%0.2d-%0.2d' % (utc_tuple.year, utc_tuple.month, utc_tuple.day))

def TimestampUTCToISO8601 ( timestamp ) : utc_tuple = datetime . utcfromtimestamp ( timestamp ) return ( '%0.4d-%0.2d-%0.2d' % ( utc_tuple . year , utc_tuple . month , utc_tuple . day ) )
return the timestamp iso 8601 format: yyyy-mm-dd .