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| Should there be a note of the fact that the summer/winter percentages are only true in the northern hemisphere? In the southern hemisphere, where summer is December-February and winter is June-August, the figures should be reversed (and at the equator, summer and winter don't really exist). [[Special:Contributions/172.68.86.114|172.68.86.114]] 21:49, 1 November 2020 (UTC) | | Should there be a note of the fact that the summer/winter percentages are only true in the northern hemisphere? In the southern hemisphere, where summer is December-February and winter is June-August, the figures should be reversed (and at the equator, summer and winter don't really exist). [[Special:Contributions/172.68.86.114|172.68.86.114]] 21:49, 1 November 2020 (UTC) |
| :I'm not entirely sure ''which'' season boundaries are being espoused. Equinox/Solstice ones (summer starts on "mid-summer's day", ''sic''), mid-way between adjacent equinoces/solstices (mid-summer's day ''is'' exactly half way through summer), meteorlogical (groupings of three calendar months)..? I suspect the latter, to provide the off-quarter values from almost continually variable month-lengths, but the other two (in conjunction with the elliptical orbit of the Earth changing the rate each phase of oscillation made by the ecliptic) would be a far more scientific reason worthy of Randall. [[Special:Contributions/162.158.155.102|162.158.155.102]] 02:47, 2 November 2020 (UTC) | | :I'm not entirely sure ''which'' season boundaries are being espoused. Equinox/Solstice ones (summer starts on "mid-summer's day", ''sic''), mid-way between adjacent equinoces/solstices (mid-summer's day ''is'' exactly half way through summer), meteorlogical (groupings of three calendar months)..? I suspect the latter, to provide the off-quarter values from almost continually variable month-lengths, but the other two (in conjunction with the elliptical orbit of the Earth changing the rate each phase of oscillation made by the ecliptic) would be a far more scientific reason worthy of Randall. [[Special:Contributions/162.158.155.102|162.158.155.102]] 02:47, 2 November 2020 (UTC) |
− | ::By my reckoning the proportions of seasons by various standards are as follows:
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− | {| class="wikitable"
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− | ! colspan="2" | Season !! colspan="2" | Meteorological !! colspan="2" | Summer starts 'mid-summer' !! colspan=3 | Summer astride 'mid-summer'
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− | |-
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− | ! Northern !! Southern !! Starts !! Prop !! Starts !! Prop !! Starts !! Mid-point 'drift' !! Prop
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− | |-
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− | | Winter 19/20 || Summer 19/20 || style="background: yellow;" | 1/Dec/2019 || style="background: yellow;" | 24.86% || style="background: yellow;" | 22/Dec/2019 04:19 || style="background: yellow;" | 24.36% || 7/Nov/2019 06:04 || 5h14m early || not calculated
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− | |-
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− | | Spring 20 || Autumn 20 || style="background: yellow;" | 1/Mar/2020 || style="background: yellow;" | 25.14% || style="background: yellow;" | 20/Mar/2020 03:50 || style="background: yellow;" | 25.39% || style="background: yellow;" | 4/Feb/2020 16:04 || style="background: yellow;" | 22h35m late || style="background: yellow;" | 24.88%
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− | | Summer 20 || Winter 20 || style="background: yellow;" | 1/Jun/2020 || style="background: yellow;" | 25.14% || style="background: yellow;" | 20/Jun/2020 21:43 || style="background: yellow;" | 25.64% || style="background: yellow;" | 5/May/2020 12:46 || style="background: yellow;" | 5h26m late || style="background: yellow;" | 25.52%
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− | | Autumn 20 || Spring 20 || style="background: yellow;" | 1/Sep/2020 || style="background: yellow;" | 24.86% || style="background: yellow;" | 22/Sep/2020 13:21 || style="background: yellow;" | 24.60% || style="background: yellow;" | 6/Aug/2020 17:32 || style="background: yellow;" | 22h44m early || style="background: yellow;" | 25.12%
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− | | Winter 20/21 || Summer 20/21 || 1/Dec/2020 || 24.66% || 21/Dec/2020 10:03 || 24.36% || style="background: yellow;" | 6/Nov/2020 11:42 || style="background: yellow;" | 5h17m early || style="background: yellow;" | 24.48%
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− | | Spring 21 || Autumn 21 || 1/Mar/2021 || 25.21% || 20/Mar/2021 09:37 || 25.39% || 3/Feb/2021 11:42 || 22h35m late || 24.88%
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− | | Summer 21 || Winter 21 || 1/Jun/2021 || 25.21% || 21/Jun/2021 03:32 || 25.64% || 5/May/2021 18:34 || 5h28m late || 25.52%
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− | | Autumn 21 || Spring 21 || 1/Sep/2021 || 24.93% || 22/Sep/2021 19:21 || 24.60% || 6/Aug/2021 23:26 || 22h47m early || 25.12%
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− | | Winter 21/22 || Summer 21/22 || style="background: yellow;" | 1/Dec/2021 || style="background: yellow;" | 24.66% || style="background: yellow;" | 21/Dec/2021 15:59 || style="background: yellow;" | not calc. || 6/Nov/2021 23:26 || 5h16m early || 24.48%
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− | |}
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− | ::This covers two entire years (leap and non-leap). It assigns (northern) winter to whatever year it most lies within, for percentile purposes, as indicated by shared background. The 'astride' seasons start at the calculated mid-point between astronomical 'quarter-points', which is probably not how it's based IRL, and I give the mid-point difference from the quarter-point that ''should'' be their mid-point. Times are UTC, bare dates can be assumed midnight to midnight. Any leap-seconds I may have ignored are well below my level of precision. Also note E&OE, with plenty of possible transfer errors in plugging the raw details into the spreadsheet then re-transfering the spreadsheet into a wikitable format (across various screens/machines, because I'm an idiot). Also does not take into account actual demographic distribution across the solar year, which probably is what ''really'' is at work here. But I too thought it'd be interesting to look at it this way. Enjoy! [[Special:Contributions/141.101.98.52|141.101.98.52]] 15:42, 2 November 2020 (UTC)
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| == Obama earthquake probability == | | == Obama earthquake probability == |