Day in a month when the normal body temp of girl increase 1 degrees Celsius?

Your question seems to contain a biological or medical assumption that is incorrect. The normal body temperature of an individual generally fluctuates within a narrow range and remains relatively stable throughout the month, influenced by factors such as diurnal variations, physical activity, and hormonal regulations. It does not typically experience sudden increases of 1 degree Celsius on specific days of the month due to biological patterns or regular occurrences.