Revised and updated 18 December 2025 July 25, is one of the four days a year in which the length of the solar day, the natural day measured by the rising and setting of the Sun, is 24 hours. I have written about this in previous posts but I thought it be worth mentioning it… Continue reading Understanding Solar Day Length Variation
Revised 18 December 2025 -original post published in 2024 In 2024, for the majority of the world’s Christians, March 31 was Easter Sunday, one of the most important dates in the calendar. Although Easter originated as the festival celebrating the resurrection of Jesus Christ from the dead, it is also widely marked by non-Christians in the UK, particularly as… Continue reading Easter March 31 2024
This year, the northern hemisphere winter solstice will fall on 22 December. On this date there are the fewest hours of daylight and, during the day, the Sun reaches its lowest elevation. The origin of the word solstice is from two Latin words: sol, which means Sun, and sistere, to stand still. At the time of the winter… Continue reading December 22 2023 – the solstice
In 2023 September 23 is the date of the September equinox and is also the first day of autumn (or the first day of spring if you're one of my readers in the Southern Hemisphere). In this post I’ll talk about the equinoxes and discus the commonly held, but incorrect, view that they are the… Continue reading September 23 2023 the equinox
In 2023 March 20 is the date of the March equinox and is also the first day of spring (or the first day of autumn if you're one of my readers in the Southern Hemisphere). In this post I’ll talk about the equinoxes and discuss the commonly held, but not quite correct, view, that they… Continue reading The equinox 20 March 2023
Explaining Science 