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The mean tropical year on January 1, 2000, was 365.242 189 7 or 365 ephemeris days, 5 hours, 48 minutes, 45.19 seconds. This changes slowly; an expression suitable for calculating the length of a tropical year in ephemeris days, between 8000 BC and 12000 AD is
The Southward equinox was "New Year's Day" in the French Republican Calendar, which was in use from 1793 to 1805. The French First Republic was proclaimed and the French monarchy was abolished on September 21, 1792, making the following day (the equinox day that year) the first day of the "Republican Era" in France. The start of every year was ...
The tropical year is defined as the mean time interval between vernal equinoxes; it corresponds to the cycle of the seasons. The following expression, based on the orbital elements of Laskar (1986), is used for calculating the length of the tropical year: 365.242 189 6698 days − 0.000 006 153 59 T − 7.29 × 10 −10 T 2 + 2.64 × 10 −10 T 3
Thus, every 2 to 3 years there is a discrepancy of 22 to 33 days, or a full synodic month. For example, if the winter solstice and the new moon coincide, it takes 19 tropical years for the coincidence to recur. The mathematical logic is this: A tropical year lasts 365.2422 days. [21] a span of 19 tropical years (365.2422 × 19) lasts 6,939.602 days
Pantone's Color of the Year program started in 1999 when Cerulean Blue was announced as Color of the Year for 2000. See every inspiring past selection to date.
As revealed by Garden Media’s 2025 Garden Trends Report, the color of the year is ... Bringing to mind tropical waters and the Gen Z beloved Fruitger Aero aesthetic, the blue-green hue is a ...
Indeed, from the values of the tropical year (365.2421896698 days) and the synodic month (29.530588853) cited in the respective articles of Wikipedia, it follows that the length of 228=12×19 tropical years is about 83,275.22 days, shorter than the length of 12×235 synodic months—namely about 83,276.26 days—by one day plus about one hour.
Some colors are simply universal, playing a significant role in every culture and every era—indeed in every person’s life. Such is our 2025 Color of the Year , Cosmic Cobalt.