In Ahmedabad , Millions of Muslims across the world celebrated the first day of the Eid al-Fitr holiday on Tuesday, which marks the end of the month-long fast of Ramadan.The three-day-long Eid al-Fitr holiday is a time to celebrate the completion of Ramadan, a month devoted to worship and repentance during which observing Muslims abstain from food and water from sunrise to sunset every day.