Following the previous day announcement, Muslims in capital Dhaka and elsewhere in the country rushed to mosques on Saturday night to conduct special prayers for 1st Ramadan.
Muslims in Bangladesh received the arrival of Ramadan gladly by offering prayers and then eating Sheri meal before fajr prayer, Xinhua reported.
During the month of Ramadan, Muslims conduct special prayers each night during which long portions of the Quran are recited.
Since Sunday afternoon, Muslims in Bangladesh capital Dhaka have been seen to throng traditional markets for purchasing Iftar, the evening meal when Muslims break their fast.
During Ramadan, the month of self-certification through fasting and abstinence, Muslims in Dhaka usually buy their Iftar from a century old traditional market in the old part of Dhaka.
There was no exception this time.
There was a festive atmosphere before sundown in old Dhaka's traditional market where makeshift stall owners and itinerant vendors sell food data-x-items to thousand of customers.
Sellers of scores of makeshift shops in the market were seen Sunday busy selling the unique and traditional data-x-items for Iftar.
Many in the country believe that the traditional Iftar data-x-items in this market have a distinct appeal to the food connoisseurs after daylong fasting during this month.
People were seen to buy food data-x-items for Iftar including several types of fruits, delicious kebab, custard and curd.
Muslims follow a lunar calendar and a moon sighting method that can lead to different countries declaring the start of Ramadan a day or two apart.
Traditionally, Muslim countries announce Ramadan if their moon sighting councils spot the Ramadan crescent in the evening before fasting begins.
Ramadan ends with the festival of Eid, one of the largest Muslim religious festivals.