Interestingly (as well as the fact above) the earliest sunset was a week or so back, and the latest sunrise is around the new year.
Also interesting to me (and my moods) – while the summer and winter equinoxes get the attention, it’s the Spring and Autumn ones that affect me most. Because if you actually take the daylight hours (D) on a per day basis (broadly a sine curve), and take the first differential of that to identify the rate of change of daylight hours on a per day basis (the equiv cosine curve) – then it’s in the Spring and Autumn that dD/dt is a maximum and minimum, and that fact makes me happy / sad accordingly.
(In layman’s terms, in March the days are getting longer at their fastest. At his time of year it’s dark in the morning and evening, and it’ll be the same last week, and next week, and you won’t notice the difference. But in March…. it’ll be dark when you set off for you Weds night night ride, but next week they’ll be a bit of light in the sky at the same time, and the week after you won’t need lights for the first part, and the week after you can almost do the first hour without, and so on….. and that when it really feels she’s properly on her way)
