Bakra-id is one of the special festivals celebrated by Muslims irrespective of the fact, that wherever a Muslim person is, the festival of Eid -Ul -Adha is celebrated with lot of enthusiasm.

Muslims celebrate the festival of Eid -Ul –Adha in remembrance of prophet Abraham’s readiness to sacrifice his son Ishmael to God. On Eid -Ul –Adha Muslims sacrifice their domestic animals, like goat, sheep, cow, camel etc. This sacrifice of animals is made by Muslims to pay a tribute to prophet Abraham, as he was ready to sacrifice his son but God gave him a Sheep to sacrifice.

Eid -Ul –Adha celebrations occur after the Hajj and the festival of Eid -Ul –Adha is celebrated on the tenth day of the last month of Islamic year, Duhl- Hijja. Eid -Ul –Adha is known through several names across the world and this festival of sacrifice is celebrated for several days in some areas of the country. It is seen that Muslims celebrate this festival with great excitement no matter where they are.

Islamic month starts at end of the day, on the day when lunar crescent comes into view after the new moon that can be seen with a naked eye. It is seen that the observability depends on a number of factors such as:

• Natural climatic conditions,
• Height of moon at the end of the day
• Proximity of moon to the sun during sunset,
• The time between the sunset and moonset,
• Pollution level in the atmosphere,
• Accuracy of the eye of viewer

So the visibility of moon at any place on earth cannot be predicted in advance and therefore this festival of Eid -Ul –Adha is celebrated on different days in several places all over the world.

Since the lunar calendar depicts the date of Eid -Ul –Adha, it is seen that every year Eid -Ul –Adha occurs eleven days before the previous years Eid -Ul –Adha.