Space Live_Let_Live • 1 week ago • 90%

cross-posted from: https://lemmy.world/post/19541930 > Preferably a Holocene colander? > > A consensus view was formally adopted by the IUGS in 2013, placing its start at 11,700 years before 2000 (9701 BC), about 300 years more recent than the epoch of the Holocene calendar.[6] > > Some problems with Gregorian calendar > > The Gregorian calendar improves the approximation made by the Julian calendar by skipping three Julian leap days in every 400 years, giving an average year of 365.2425 mean solar days long.[82] This approximation has an error of about one day per 3,030 years[s] with respect to the current value of the mean tropical year. However, because of the precession of the equinoxes, which is not constant, and the movement of the perihelion (which affects the Earth's orbital speed) the error with respect to the astronomical vernal equinox is variable; using the average interval between vernal equinoxes near 2000 of 365.24237 days[83] implies an error closer to 1 day every 7,700 years. By any criterion, the Gregorian calendar is substantially more accurate than the 1 day in 128 years error of the Julian calendar (average year 365.25 days). > > In the 19th century, Sir John Herschel proposed a modification to the Gregorian calendar with 969 leap days every 4,000 years, instead of 970 leap days that the Gregorian calendar would insert over the same period.[84] This would reduce the average year to 365.24225 days. Herschel's proposal would make the year 4000, and multiples thereof, common instead of leap. While this modification has often been proposed since, it has never been officially adopted.[85] > > On time scales of thousands of years, the Gregorian calendar falls behind the astronomical seasons. This is because the Earth's speed of rotation is gradually slowing down, which makes each day slightly longer over time (see tidal acceleration and leap second) while the year maintains a more uniform duration. > > Calendar seasonal error > Gregorian calendar seasons difference > >  > > This image shows the difference between the Gregorian calendar and the astronomical seasons. > > The y-axis is the date in June and the x-axis is Gregorian calendar years. > > Each point is the date and time of the June solstice in that particular year. The error shifts by about a quarter of a day per year. Centurial years are ordinary years, unless they are divisible by 400, in which case they are leap years. This causes a correction in the years 1700, 1800, 1900, 2100, 2200, and 2300. > > For instance, these corrections cause 23 December 1903 to be the latest December solstice, and 20 December 2096 to be the earliest solstice—about 2.35 days of variation compared with the astronomical event. > > Proposed reforms > The following are proposed reforms of the Gregorian calendar: > > Holocene calendar > > International Fixed Calendar (also called the International Perpetual calendar) > > World Calendar > > World Season Calendar > > Leap week calendars > > Pax Calendar > > Symmetry454 > > Hanke–Henry Permanent Calendar

Atheism Live_Let_Live • 1 week ago • 91%

Preferably a Holocene colander? A consensus view was formally adopted by the IUGS in 2013, placing its start at 11,700 years before 2000 (9701 BC), about 300 years more recent than the epoch of the Holocene calendar.[6] Some problems with Gregorian calendar The Gregorian calendar improves the approximation made by the Julian calendar by skipping three Julian leap days in every 400 years, giving an average year of 365.2425 mean solar days long.[82] This approximation has an error of about one day per 3,030 years[s] with respect to the current value of the mean tropical year. However, because of the precession of the equinoxes, which is not constant, and the movement of the perihelion (which affects the Earth's orbital speed) the error with respect to the astronomical vernal equinox is variable; using the average interval between vernal equinoxes near 2000 of 365.24237 days[83] implies an error closer to 1 day every 7,700 years. By any criterion, the Gregorian calendar is substantially more accurate than the 1 day in 128 years error of the Julian calendar (average year 365.25 days). In the 19th century, Sir John Herschel proposed a modification to the Gregorian calendar with 969 leap days every 4,000 years, instead of 970 leap days that the Gregorian calendar would insert over the same period.[84] This would reduce the average year to 365.24225 days. Herschel's proposal would make the year 4000, and multiples thereof, common instead of leap. While this modification has often been proposed since, it has never been officially adopted.[85] On time scales of thousands of years, the Gregorian calendar falls behind the astronomical seasons. This is because the Earth's speed of rotation is gradually slowing down, which makes each day slightly longer over time (see tidal acceleration and leap second) while the year maintains a more uniform duration. Calendar seasonal error Gregorian calendar seasons difference  This image shows the difference between the Gregorian calendar and the astronomical seasons. The y-axis is the date in June and the x-axis is Gregorian calendar years. Each point is the date and time of the June solstice in that particular year. The error shifts by about a quarter of a day per year. Centurial years are ordinary years, unless they are divisible by 400, in which case they are leap years. This causes a correction in the years 1700, 1800, 1900, 2100, 2200, and 2300. For instance, these corrections cause 23 December 1903 to be the latest December solstice, and 20 December 2096 to be the earliest solstice—about 2.35 days of variation compared with the astronomical event. Proposed reforms The following are proposed reforms of the Gregorian calendar: Holocene calendar International Fixed Calendar (also called the International Perpetual calendar) World Calendar World Season Calendar Leap week calendars Pax Calendar Symmetry454 Hanke–Henry Permanent Calendar

Fediverse Live_Let_Live • 2 weeks ago • 89%

I wish it was allowed to have persian letter usernames maybe even symbols as usernames it looks really cool and increases the username pool as well.

News Live_Let_Live • 3 weeks ago • 73%

now, anyone wants to talk about how many times do muslims curse non-muslims (and that too idol worshipers) in their daily 5 prayers? sorry can't do that

Fediverse Live_Let_Live • 4 weeks ago • 23%

I want to suggest adding a feature that lets user post on their profile rather than communities Also i is live chat possible here in future?

Selfhosted Live_Let_Live • 2 months ago • 76%

Hi i just wanted to know if it is possible to host instance completely without renting anything. if you have a video on it can you please share it here?

Cybersecurity - Memes Live_Let_Live • 3 months ago • 84%

i am interested in getting a job in cybersecurity