solar calender

例句：

1. 1. The solar calendar is used to predict the date of the next solar eclipse.
   太阳能日历用于预测下一次日食的日期。
2. 2. The solar calendar has been used for centuries to help people plan their lives around the sun's movement.
   太阳能日历已经使用了几个世纪来帮助人们根据太阳的运动规划自己的生活。
3. 3. The solar calendar is a useful tool for farmers to plan their planting and harvesting schedules.
   太阳能日历是农民规划种植和收割计划的一个有用的工具。