After the summer solstice, when days are at their longest, each day starts to become shorter by about one minute every three days. However, this process accelerates and decelerates slightly depending on the particular day.
As the summer progresses, the rate of daylight loss increases. Around the time of the autumnal equinox in late September, when the day and night are exactly equal, the days grow shorter by about three minutes per day. However, the speed of this process reverses itself shortly after that point, and by the winter solstice, when the nights are longest, daylight again decreases by about one minute per three days. A similar rate occurs with the increase of daylight between the winter and summer solstices. The particular loss of daylight per day also depends on the location's latitude.