If sunrise is at 6:00 AM and sunset is at 6:00 PM, a death occurring before 1:30 AM is counted as the previous day. If it occurs after that, it is counted as the next day. This changes depending on sunrise and sunset. In Margazhi, nighttime is longer, and in summer, it is slightly shorter. Sometimes sunrise and sunset occur at 6:30. In such cases, they are listed as Ahas (daytime) in the Panchangam. The remaining time is nighttime. Dividing that nighttime into 8 parts, the first 5 parts are considered the previous day, and the next 3 parts are considered the next day.