The Canary Islands use Greenwich Mean Time (GMT). This means the time zone is exactly the same as the UK while mainland Spain and other European countries are one hour ahead.
Spring officially begins in March meaning the clocks go forward by one hour for daylight saving time. They then go back one hour in late October.
Spain-Tenerife recommends that you do not drink water from the tap or public fountains. Canarians usually drink bottled water and we advise you do the same. You may see signs by public fountains which say ‘agua potable’ (drinkable water) and ‘agua no potable’ (water not drinkable).