Hansik takes place on the 105th day after dongzhi, which translates to April 5 in the Gregorian calendar, except in leap years when it is on April 4 instead. It is a day to welcome the warm weather thawing the frozen lands. On this day, rites to worship ancestors are observed early in the morning, and the family visits their ancestors' tombs to tidy up. The custom of eating cold food on the day has, however, disappeared. Since this day coincides with Arbor Day, public cemeteries are crowded with visitors planting trees around the tombs of their ancestors.

Jesa, the ancestral celebration, is being offered for the Korean deceased ancestors to clean up and maintain their graves.

Another reason for this ritual is to plead for productive and successful farming activities. When celebrating Hansik, Koreans are supposed to eat only cold food, such as Ssuktteok (mugwort cake), Ssukdanja (mugwort dumpling), Ssuktang (mugwort soup), and some side dishes including Kimchi.