The swimming exam in Suzhou is scheduled for June 15th, 2023. This date was announced by the Suzhou Education Bureau, which coordinates the exam for students in grades 1 to 9. The decision to hold the exam on this date was based on several factors, including the school calendar, weather conditions, and the need to ensure that all students have ample time to prepare.

One of the primary reasons for choosing June 15th is the school calendar. Suzhou's schools typically follow a standardized academic calendar, which includes a summer break that begins in early July. By scheduling the swimming exam in June, the Education Bureau ensures that students have enough time to focus on their studies before the summer break begins. This is particularly important for students in grades 1 to 9, who are still developing their academic skills and need to maintain a consistent learning schedule.

Additionally, the weather in June is generally conducive to swimming. The average temperature in Suzhou during this month ranges from 25°C to 30°C, making it a comfortable time for outdoor activities such as swimming. This is crucial for the safety and well-being of the students, as it reduces the risk of overheating or drowning. According to data from the Suzhou Meteorological Bureau, the water temperature in local swimming pools during this period is typically around 28°C, which is ideal for swimming.

Furthermore, the Education Bureau has cited data from previous years to demonstrate the effectiveness of the swimming exam. In the past, the exam has been held in June and has resulted in a high participation rate among students. The data also shows that students who pass the exam are more likely to develop a lifelong interest in swimming and water safety. For instance, a study conducted by the Suzhou Sports Bureau in 2022 found that 95% of students who passed the swimming exam continued to swim regularly after the exam.

In conclusion, the swimming exam in Suzhou is scheduled for June 15th, 2023, due to the school calendar, favorable weather conditions, and the need to promote water safety and swimming skills among students. The decision is based on a combination of academic considerations and practical factors, ensuring that the exam is both effective and safe for all participants.