Raja Sankranti (Swing festival) or Mithuna Sankranti is the first day of the month of Asara (June-July) from which the season of rains starts. It inaugurates and welcomes the agricultural year all over Orissa which marks, through biological symbolism, the moistening of the summer parched soil with the first showers of the monsoon, thus making it ready for productivity. To celebrate the advent of monsoon, the joyous festival is arranged for three days by the villagers. Though celebrated all over the state it is more enthusiastically observed in the districts of Cuttack, Puri and Balasore. The first day is called Pahili Raja (Prior Raja), second is Raja (Proper Raja) and third is Basi Raja (Past Raja).

According to popular belief as women menstruate, which is a sing of fertility, so also Mother Earth menstruates. So all three days of the festival are considered to be the menstruating period of Mother Earth. During the festival all agricultural operations remain suspended. As in Hindu homes menstruating women remain secluded because of impurity and do not even touch anything and are given full rest, so also the Mother Earth is given full rest for three days for which all agricultural operations are stopped. Significantly, it is a festival of the unmarried girls, the potential mothers. They all observe the restrictions prescribed for a menstruating woman. The very first day, they rise before dawn, do their coiffeur, annoint their bodies with turmeric paste and oil and then take the purificatory bath in a river or tank. Peculiarly, bathing for the rest two days is prohibited. They don't walk bare-foot do not scratch the earth, do not grind, do not tear anything apart, do not cut and do not cook. During all the three consecutive days they are seen in the best of dresses and decorations, eating cakes and rich food at the houses of friends and relatives, spending long cheery hours, moving up and down on improvised swings, rending the village sky with their merry impromptu songs. The swings are of different varieties, such as Ram Doli, Charki Doli, Pata Doli, Dandi Doli etc. Songs specially meant for the festival speak of love, affection, respect, social behaviour and everything of social order that comes to the minds of the singers. Through anonymous and composed extempore, much of these songs, through shere beauty of diction and sentiment, have earned permanence and have gone to make the very substratum of Orissa's folk-poetry.

While girls thus scatter beauty, grace and music all around, moving up and down on the swings during the festival, young men give themselves to strenuous games and good food, on the eve of the onset of the monsoons which will not give them even a minute's respite for practically four months making them one with mud, slush and relentless showers, their spirits keep high with only the hopes of a good harvest. As all agricultural activities remain suspended and a joyous atmosphere pervades, the young men of the village keep themselves busy in various types of country games, the most favourite being kabadi. Competitions are also held between different groups of villages. All nights 'Yatra' performances or 'Gotipua' dances are arranged in prosperous villages where they can afford the professional groups. Plays and other kinds of entertainment are also arranged by enthusiastic amateurs.

The special variety of cake prepared out of recipes like rice-powder, molasses, coconut, camphor, ghee etc. goes in the name of Poda Pitha (burnt cake). The size of the cake varies according to the number of family members. Cakes are also exchanged among relatives and friends. Young girls do not take rice during the three-day festival and sustain only with this type of cake, fried-rice(mudi) and vegetable curry.