Reliable astronomical data from HM Nautical Almanac Office and Crescentwatch.org indicates the crescent moon is likely to be visible in the Americas, Africa and parts of Australia on Saturday night, 28th June, and in all regions on Sunday night, 29th June.
Hence, the first day of fasting in the Americas and Africa should be on Sunday, 29th June, while in the United Kingdom, most of Europe and Asia, the first day of fasting will be Monday, 30th June.
http://astro.ukho.gov.uk/moonwatch/nextnewmoon.html
http://www.crescentwatch.org/cgi-bin/cw.cgi
Paul Salahuddin Armstrong 
GEOGRAPHICAL DIFFERENCES SEEMS TO INDICATE IST ROZAH IS ON SUNDAY . VISIBILITY OF MOON IN DELHI ALMOST IMPOSSIBLE , MAY BE INFORMATION FROM OTHER REGIONS OF INDIA WILL FINALLY DECIDE .