December 21st at 5:11 PM (EST), the tilt of the earth's axis reaches the farthest away from the sun (for the northern hemisphere) and the point of least solar radiation for the year. This is called the winter solsitce and marks the begining of winter. It is also the shortest day of the year. Sunrise today comes at 8:01 AM and sunset occurs at 5:06 PM, giving us just 9 hours and 5 minutes of sunlight in Ann Arbor. After this point, the days get longer and the weather, eventually, starts to warm up. From this point, we can start looking forward to spring and a new golf season.