 DST would continue to be observed as WEST () from the last Sunday in March to the last Sunday in October, thus also adopting the then-recently changed EU rules regarding DST.In the same year, Azores and Madeira regional parliaments also approved regional laws who adopted the new EU rules to their time zones, thus making that DST started to be observed from the last Sunday in March to last Sunday in October in the whole country.In 1996 Portugal adopted ISO 8601 via EN 28601 as NP EN 28601