The National Moon Sighting Committee took the decision at a meeting after reviewing information that the Shawwal moon was sighted at different parts of the country Monday, Xinhua reported.
The meeting decided that the Islamic month of Shaawal calendar will begin Tuesday.
Therefore, Eid-ul-Fitr will be celebrated across the country on the day amid religious zest and enthusiasm, ending the month-long fasting.
President Abdul Hamid, Prime Minister Sheikh Hasina and former prime minister Khaleda Zia conveyed Eid greetings to the countrymen in separate messages.
The government earlier announced a three-day holiday starting from Monday on the occasion of Eid-ul-Fitr.
The national flag of the country will be hoisted atop government and non-government offices while most of the streets and roads are being decorated with flags with 'Eid Mubarak' written in Bangla and Arabic.
Special meals will be served in hospitals, jails, government-owned welfare centres and shelter homes for children, socially-handicapped people and the destitute.
Officials said additional forces will be deployed at all strategic points including commercial hubs and main Eid congregation grounds in major cities to heighten security on the day of Eid-ul-Fitr.