Daylight saving time (DST) also known as "Summer Time" is the method/practice of advancing clocks so that afternoons have more
day light and mornings have less. Most of the countries change the days of transitions to DST on every year.
The below list shows the world countries that observe Daylight Saving Time in 2015.
World Countries observe the Daylight saving time during summer. It is usually one hour ahead of the standard time.
When DST is not observed in a country, the "Standard Time" a normal or winter time is practiced.