উৎসব বলতে সাধারণত সামাজিক, ধর্মীয় এবং ঐতিহ্যগত প্রেক্ষাপটে পালিত আনন্দ অনুষ্ঠানকে বোঝায়। বাংলাদেশে উৎসবের সময় জাতি-ধর্ম নির্বিশেষে সকল মানুষ আনন্দে মেতে ওঠে।

A festival is an event celebrated by a community and centering on some characteristic aspect or aspects of that community and its religion or cultures. It is often marked as a local or national holiday, mela, or eid. A festival constitutes typical cases of glocalization, as well as the high culture-low culture interrelationship. Next to religion and folklore, a significant origin is agricultural. Food is such a vital resource that many festivals are associated with harvest time. Religious commemoration and thanksgiving for good harvests are blended in events that take place in autumn, such as Halloween in the northern hemisphere and Easter in the southern.