The local current is 220 AC and the connection has a two-pin plug.
Travellers from the USA will require a voltage converter.
Travellers from the UK will require a plug adapter that can be bought at home or here in an appliance store.
Tap water is safe to drink and of good quality. In Porto Santo the water is desalinated and can be consumed without question.
The islands of the Madeiran archipelago operate on the 24-hour clock, which can be quite confusing for those who are accustomed to 'am' & 'pm'. In this time convention, the day is divided into 24 hours (from midnight to midnight) instead of two periods of 12 hours (am & pm).
Madeira maintains Coordinated Universal Time (UTC/GMT) and UTC+1 as summer time.
Clocks are always put forward one hour on the last Sunday of March and back one hour on the last Sunday of October according to the rules of the European Union.