This study was conducted to reset the transplanting period to produce high-quality rice in the South regions due to the rise in airtemperature caused by global warming. From May 15 to June 25, transplants were performed five times every ten days. Quantity and qualitywere comprehensively reviewed, including watering season, ripened grain rate, head rice rate, head rice yield, protein content, and palatability. In the southern plains, medium-late and medium maturing cultivars yielded the most when transplanted on June 15, while early maturingcultivars yielded the most when transplanted on June 25. Considering the quality and quantity of rice, the optimal transplanting window formedium-late maturing cultivars is June 10-15, for medium maturing cultivars it is June 15-20, and for early maturing cultivars it is June25. In the middle of the southern region, the highest yield was on June 25 for medium-late maturing and June 15 for medium maturingand early maturing. However, considering the quality, the best time for transplanting is June 10 for medium-late maturing, June 5 for mediummaturing, and June 15 for early maturing. As a result of the rise in average temperature, the transplantation period was delayed by at least4 to 16 days in all varieties and regions relative to the traditio...