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Difference between revisions of "Help:Manual of Style (dates and times)"

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m (Happy5214 moved page Talk:Riesel prime 2 25039 to Help:Using old PrimePages data without leaving a redirect: More useful as a help page (Karsten can figure out the title later))
(Expanding with general information on dates and times)
 
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For the place-holder dates prior to about 1995 for prime submissions at top-5000, Karsten and I have been handling them as follows:
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==Overview==
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This page serves as a style guide for dates and times on the Prime-Wiki.
  
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1. If the date is Jan. 1st, we show the prior year with no month or day, i.e. 1989 in this case.<br>
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==In general==
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2. If the date is the 1st of some other month, we show the year and month of the previous month, i.e. 3/1/1993 would be shown as 1993-02 with no day shown.<br>
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===Dates===
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* All dates shall be in year-month-day order and be all-numeric (<code>YYYY[-MM-DD]</code>), as in [[wikipedia:ISO 8601|ISO 8601]].
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* CE/BCE shall be used in preference to AD/BC for years in the classical period.
  
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All (most) of the old dates were entered in CST (U.S. Central time zone) as the last day, minute, and second of the month or year in which they were discovered, i.e. time of 23:59:59. When PrimeGrid took it over, all of the times were converted to UTC effectively adding 5 or 6 hours to them.  The dates are now the 1st of the month following the find and the times are all 4:59:59 or 5:59:59 depending on CST daylight saving time at the time of submission. It would be UTC-6 in winter and UTC-5 in summer.
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===Times===
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* All times shall be based on a 24-hour clock (<code>HH:MM[:SS]</code>).
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* There is no consensus yet as to a standard time zone for this Wiki.
  
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Showing at least the year would provide more info than ? but would be more accurate than 1990-01-01.
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==Special cases==
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===Importing dates from the PrimePages===
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Several dates in [[The Prime Pages|the PrimePages]] prior to about 1996 are placeholders, where only part of the date (and none of the time) is actually known. A date can usually be identified as a placeholder if the time is "4:59:59" or "5:59:59". Most placeholders, but not all, are on the first day of the month. All/most of the old dates/times were entered in CST/CDT ([[wikipedia:Central Time Zone|U.S. Central Time Zone]]) as the last day, minute, and second of the month/year in which they were discovered, i.e. local time of 23:59:59. When PrimeGrid took over management of the site, all of the times were converted to UTC. This had the effect of adding 5 (if that date fell within daylight saving time under the rules of that time) or 6 hours (otherwise) to them, resulting in all these placeholder dates now being shown on the 1st of the following month.
  
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[[User:Gd barnes|Gary Barnes]] ([[User talk:Gd barnes|talk]]) 12:57, 24 June 2024 (UTC)
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When importing placeholder date data into the Wiki for prime submissions at the PrimePages, we follow this procedure:
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* If the date is Jan. 1st, use only the prior year with no month or day, e.g. "1/1/1990" is shown here as "1989".
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* If the date is the 1st of some other month, use the year and month of the previous month, e.g. "3/1/1993" is shown here as "1993-02", with no day shown.
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* Otherwise, use the full date of the previous day, e.g. "9/3/1994 04:59:59" is shown here as "1994-09-02".
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[[Category:Help]]

Latest revision as of 08:26, 9 September 2024

Overview

This page serves as a style guide for dates and times on the Prime-Wiki.

In general

Dates

  • All dates shall be in year-month-day order and be all-numeric (YYYY[-MM-DD]), as in ISO 8601.
  • CE/BCE shall be used in preference to AD/BC for years in the classical period.

Times

  • All times shall be based on a 24-hour clock (HH:MM[:SS]).
  • There is no consensus yet as to a standard time zone for this Wiki.

Special cases

Importing dates from the PrimePages

Several dates in the PrimePages prior to about 1996 are placeholders, where only part of the date (and none of the time) is actually known. A date can usually be identified as a placeholder if the time is "4:59:59" or "5:59:59". Most placeholders, but not all, are on the first day of the month. All/most of the old dates/times were entered in CST/CDT (U.S. Central Time Zone) as the last day, minute, and second of the month/year in which they were discovered, i.e. local time of 23:59:59. When PrimeGrid took over management of the site, all of the times were converted to UTC. This had the effect of adding 5 (if that date fell within daylight saving time under the rules of that time) or 6 hours (otherwise) to them, resulting in all these placeholder dates now being shown on the 1st of the following month.

When importing placeholder date data into the Wiki for prime submissions at the PrimePages, we follow this procedure:

  • If the date is Jan. 1st, use only the prior year with no month or day, e.g. "1/1/1990" is shown here as "1989".
  • If the date is the 1st of some other month, use the year and month of the previous month, e.g. "3/1/1993" is shown here as "1993-02", with no day shown.
  • Otherwise, use the full date of the previous day, e.g. "9/3/1994 04:59:59" is shown here as "1994-09-02".
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