The holy month of Ramadan is starting from Saturday in most of the countries while others will observe the first fast on Sunday. In some countries the fasting will be for just few hours such while in others countries it will last for almost whole day.
The longest Roza will be observed in Greenland which will continue for 21 hours & shortest Roza of 10 Hours will be observed in Chile. For 2017 Ramadan the fasting hours in different parts of the world are as following:
Nuuk, Greenland: 21 hours
Stockholm, Sweden: 19.5 hours
Moscow, Russia: 19 hours
London, UK: 18.5 hours
Beijing, China: 16.5 hours
New York, US: 16.5 hours
Islamabad, Pakistan: 16 hours
New Delhi, India: 15 hours
Muscat, Oman: 15 hours
Riyadh, Saudi Arabia 15 hours
Kuala Lumpur, Malaysia 13.5 hours
Jakarta, Indonesia 13 hours
Canberra, Australia 11.5 hours
Punta Arenas, Chile 10 hours