The paper presents a comprehensive analysis of global changes in daily climate extremes of temperature and precipitation, focusing on extreme events. The authors developed a suite of climate change indices derived from daily temperature and precipitation data, using a standardized formula and software to ensure seamless integration of data from different countries. The indices were analyzed for the period 1951-2003, with seasonal and annual trends computed and tested for statistical significance. Key findings include: - Widespread significant changes in temperature extremes, particularly in minimum temperature indices, indicating a positive shift in the distribution of daily minimum temperatures. - Over 70% of the global land area showed a significant decrease in the annual occurrence of cold nights and a significant increase in the annual occurrence of warm nights. - Daily maximum temperature indices showed similar changes but with smaller magnitudes. - Precipitation indices showed a widespread and significant increase, though less spatially coherent compared to temperature changes. - Probability distributions of indices derived from approximately 200 temperature and 600 precipitation stations, covering a large region of the Northern Hemisphere midlatitudes and parts of Australia, were analyzed for the periods 1901-1950, 1951-1978, and 1979-2003, indicating a significant warming throughout the 20th century. - Differences in temperature indices distributions are particularly pronounced between the most recent two periods and for those indices related to minimum temperature. - Precipitation indices show a tendency toward wetter conditions throughout the 20th century. The study highlights the importance of using high-quality daily data and standardized methods to analyze climate change, providing a robust assessment of global climate extremes.The paper presents a comprehensive analysis of global changes in daily climate extremes of temperature and precipitation, focusing on extreme events. The authors developed a suite of climate change indices derived from daily temperature and precipitation data, using a standardized formula and software to ensure seamless integration of data from different countries. The indices were analyzed for the period 1951-2003, with seasonal and annual trends computed and tested for statistical significance. Key findings include: - Widespread significant changes in temperature extremes, particularly in minimum temperature indices, indicating a positive shift in the distribution of daily minimum temperatures. - Over 70% of the global land area showed a significant decrease in the annual occurrence of cold nights and a significant increase in the annual occurrence of warm nights. - Daily maximum temperature indices showed similar changes but with smaller magnitudes. - Precipitation indices showed a widespread and significant increase, though less spatially coherent compared to temperature changes. - Probability distributions of indices derived from approximately 200 temperature and 600 precipitation stations, covering a large region of the Northern Hemisphere midlatitudes and parts of Australia, were analyzed for the periods 1901-1950, 1951-1978, and 1979-2003, indicating a significant warming throughout the 20th century. - Differences in temperature indices distributions are particularly pronounced between the most recent two periods and for those indices related to minimum temperature. - Precipitation indices show a tendency toward wetter conditions throughout the 20th century. The study highlights the importance of using high-quality daily data and standardized methods to analyze climate change, providing a robust assessment of global climate extremes.