[e] (0) Clarify use of the term 'proleptic'.

Fixing https://www.w3.org/Bugs/Public/show_bug.cgi?id=20649 Affected topics: HTML git-svn-id: http://svn.whatwg.org/webapps@7740 340c8d12-0b0e-0410-8428-c7bf67bfef74
whatwg · Mar 7, 2013 · 7ef81d8 · 7ef81d8
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diff --git a/complete.html b/complete.html
@@ -4986,6 +4986,12 @@ <h4 id=dates-and-times><span class=secno>2.4.5 </span>Dates and times</h4>
 
   </div>
 
+  <p>Where this specification refers to the <dfn id=proleptic-gregorian-calendar>proleptic Gregorian calendar</dfn>, it means the
+  modern Gregorian calendar, extrapolated backwards to year 1. A date in the <a href=#proleptic-gregorian-calendar>proleptic
+  Gregorian calendar</a>, sometimes explicitly referred to as a <dfn id=proleptic-gregorian-date>proleptic-Gregorian
+  date</dfn>, is one that is described using that calendar even if that calendar was not in use at
+  the time (or place) in question. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
+
   <p class=note>The use of the Gregorian calendar as the wire format in this specification is an
   arbitrary choice resulting from the cultural biases of those involved in the decision. See also
   the section discussing <a href=#input-author-notes>date, time, and number formats</a> in forms
@@ -4995,7 +5001,8 @@ <h4 id=dates-and-times><span class=secno>2.4.5 </span>Dates and times</h4>
 
   <h5 id=months><span class=secno>2.4.5.1 </span>Months</h5>
 
-  <p>A <dfn id=concept-month title=concept-month>month</dfn> consists of a specific proleptic Gregorian date with
+<!--CLEANUP-->
+  <p>A <dfn id=concept-month title=concept-month>month</dfn> consists of a specific <a href=#proleptic-gregorian-date>proleptic-Gregorian date</a> with
   no time-zone information and no date information beyond a year and a month. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
   <p>A string is a <dfn id=valid-month-string>valid month string</dfn> representing a year <var title="">year</var> and
@@ -5054,7 +5061,8 @@ <h5 id=months><span class=secno>2.4.5.1 </span>Months</h5>
 
   <h5 id=dates><span class=secno>2.4.5.2 </span>Dates</h5>
 
-  <p>A <dfn id=concept-date title=concept-date>date</dfn> consists of a specific proleptic Gregorian date with no
+<!--CLEANUP-->
+  <p>A <dfn id=concept-date title=concept-date>date</dfn> consists of a specific <a href=#proleptic-gregorian-date>proleptic-Gregorian date</a> with no
   time-zone information, consisting of a year, a month, and a day. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
   <p>A string is a <dfn id=valid-date-string>valid date string</dfn> representing a year <var title="">year</var>, month
@@ -5297,8 +5305,9 @@ <h5 id=times><span class=secno>2.4.5.4 </span>Times</h5>
 
   <h5 id=local-dates-and-times><span class=secno>2.4.5.5 </span>Local dates and times</h5>
 
+<!--CLEANUP-->
   <p>A <dfn id=concept-datetime-local title=concept-datetime-local>local date and time</dfn> consists of a specific
-  proleptic Gregorian date, consisting of a year, a month, and a day, and a time, consisting of an
+  <a href=#proleptic-gregorian-date>proleptic-Gregorian date</a>, consisting of a year, a month, and a day, and a time, consisting of an
   hour, a minute, a second, and a fraction of a second, but expressed without a time zone. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
   <p>A string is a <dfn id=valid-local-date-and-time-string>valid local date and time string</dfn> representing a date and time if it
@@ -5485,8 +5494,9 @@ <h5 id=time-zones><span class=secno>2.4.5.6 </span>Time zones</h5>
 
   <h5 id=global-dates-and-times><span class=secno>2.4.5.7 </span>Global dates and times</h5>
 
-  <p>A <dfn id=concept-datetime title=concept-datetime>global date and time</dfn> consists of a specific proleptic
-  Gregorian date, consisting of a year, a month, and a day, and a time, consisting of an hour, a
+<!--CLEANUP-->
+  <p>A <dfn id=concept-datetime title=concept-datetime>global date and time</dfn> consists of a specific <a href=#proleptic-gregorian-date>proleptic-Gregorian
+  date</a>, consisting of a year, a month, and a day, and a time, consisting of an hour, a
   minute, a second, and a fraction of a second, expressed with a time-zone offset, consisting of a
   signed number of hours and minutes. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
@@ -5538,12 +5548,13 @@ <h5 id=global-dates-and-times><span class=secno>2.4.5.7 </span>Global dates and
     character. The string "<code title="">2001-12-21&nbsp;&nbsp;12:00Z</code>" (with two spaces
     between the components) would not be parsed successfully.</li>
 
+<!--CLEANUP-->
     <li>To unambiguously identify a moment in time prior to the introduction of the Gregorian
     calendar (insofar as moments in time before the formation of UTC can be unambiguously
     identified), the date has to be first converted to the Gregorian calendar from the calendar in
     use at the time (e.g. from the Julian calendar). The date of Nero's birth is the 15th of
-    December 37, in the Julian Calendar, which is the 13th of December 37 in the proleptic Gregorian
-    Calendar.</li> <!-- This might not be true. I can't find a reference that gives his birthday
+    December 37, in the Julian Calendar, which is the 13th of December 37 in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian
+    calendar</a>.</li> <!-- This might not be true. I can't find a reference that gives his birthday
     with an explicit statement about the calendar being used. However, it seems unlikely that it
     would be given in the Gregorian calendar, so I assume sites use the Julian one. -->
 
@@ -5623,9 +5634,10 @@ <h5 id=weeks><span class=secno>2.4.5.8 </span>Weeks</h5>
   1970. Consecutive weeks are numbered sequentially. The week before the number 1 week in a
   week-year is the last week in the previous week-year, and vice versa. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
+<!--CLEANUP-->
   <p>A week-year with a number <var title="">year</var> has 53 weeks if it corresponds to either a
-  year <var title="">year</var> in the proleptic Gregorian calendar that has a Thursday as its first
-  day (January 1st), or a year <var title="">year</var> in the proleptic Gregorian calendar that has
+  year <var title="">year</var> in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian calendar</a> that has a Thursday as its first
+  day (January 1st), or a year <var title="">year</var> in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian calendar</a> that has
   a Wednesday as its first day (January 1st) and where <var title="">year</var> is a number
   divisible by 400, or a number divisible by 4 but not by 100. All other week-years have 52
   weeks.</p>
@@ -5634,7 +5646,7 @@ <h5 id=weeks><span class=secno>2.4.5.8 </span>Weeks</h5>
   of the last day of a week-year with 52 weeks is 52.</p>
 
   <p class=note>The week-year number of a particular day can be different than the number of the
-  year that contains that day in the proleptic Gregorian calendar. The first week in a week-year
+  year that contains that day in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian calendar</a>. The first week in a week-year
   <var title="">y</var> is the week that contains the first Thursday of the Gregorian year <var title="">y</var>.</p>
 
   <p class=note>For modern purposes, a <a href=#concept-week title=concept-week>week</a> as defined here is

diff --git a/index b/index
@@ -4986,6 +4986,12 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   </div>
 
+  <p>Where this specification refers to the <dfn id=proleptic-gregorian-calendar>proleptic Gregorian calendar</dfn>, it means the
+  modern Gregorian calendar, extrapolated backwards to year 1. A date in the <a href=#proleptic-gregorian-calendar>proleptic
+  Gregorian calendar</a>, sometimes explicitly referred to as a <dfn id=proleptic-gregorian-date>proleptic-Gregorian
+  date</dfn>, is one that is described using that calendar even if that calendar was not in use at
+  the time (or place) in question. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
+
   <p class=note>The use of the Gregorian calendar as the wire format in this specification is an
   arbitrary choice resulting from the cultural biases of those involved in the decision. See also
   the section discussing <a href=#input-author-notes>date, time, and number formats</a> in forms
@@ -4995,7 +5001,8 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5 id=months><span class=secno>2.4.5.1 </span>Months</h5>
 
-  <p>A <dfn id=concept-month title=concept-month>month</dfn> consists of a specific proleptic Gregorian date with
+<!--CLEANUP-->
+  <p>A <dfn id=concept-month title=concept-month>month</dfn> consists of a specific <a href=#proleptic-gregorian-date>proleptic-Gregorian date</a> with
   no time-zone information and no date information beyond a year and a month. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
   <p>A string is a <dfn id=valid-month-string>valid month string</dfn> representing a year <var title="">year</var> and
@@ -5054,7 +5061,8 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5 id=dates><span class=secno>2.4.5.2 </span>Dates</h5>
 
-  <p>A <dfn id=concept-date title=concept-date>date</dfn> consists of a specific proleptic Gregorian date with no
+<!--CLEANUP-->
+  <p>A <dfn id=concept-date title=concept-date>date</dfn> consists of a specific <a href=#proleptic-gregorian-date>proleptic-Gregorian date</a> with no
   time-zone information, consisting of a year, a month, and a day. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
   <p>A string is a <dfn id=valid-date-string>valid date string</dfn> representing a year <var title="">year</var>, month
@@ -5297,8 +5305,9 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5 id=local-dates-and-times><span class=secno>2.4.5.5 </span>Local dates and times</h5>
 
+<!--CLEANUP-->
   <p>A <dfn id=concept-datetime-local title=concept-datetime-local>local date and time</dfn> consists of a specific
-  proleptic Gregorian date, consisting of a year, a month, and a day, and a time, consisting of an
+  <a href=#proleptic-gregorian-date>proleptic-Gregorian date</a>, consisting of a year, a month, and a day, and a time, consisting of an
   hour, a minute, a second, and a fraction of a second, but expressed without a time zone. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
   <p>A string is a <dfn id=valid-local-date-and-time-string>valid local date and time string</dfn> representing a date and time if it
@@ -5485,8 +5494,9 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5 id=global-dates-and-times><span class=secno>2.4.5.7 </span>Global dates and times</h5>
 
-  <p>A <dfn id=concept-datetime title=concept-datetime>global date and time</dfn> consists of a specific proleptic
-  Gregorian date, consisting of a year, a month, and a day, and a time, consisting of an hour, a
+<!--CLEANUP-->
+  <p>A <dfn id=concept-datetime title=concept-datetime>global date and time</dfn> consists of a specific <a href=#proleptic-gregorian-date>proleptic-Gregorian
+  date</a>, consisting of a year, a month, and a day, and a time, consisting of an hour, a
   minute, a second, and a fraction of a second, expressed with a time-zone offset, consisting of a
   signed number of hours and minutes. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
@@ -5538,12 +5548,13 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
     character. The string "<code title="">2001-12-21&nbsp;&nbsp;12:00Z</code>" (with two spaces
     between the components) would not be parsed successfully.</li>
 
+<!--CLEANUP-->
     <li>To unambiguously identify a moment in time prior to the introduction of the Gregorian
     calendar (insofar as moments in time before the formation of UTC can be unambiguously
     identified), the date has to be first converted to the Gregorian calendar from the calendar in
     use at the time (e.g. from the Julian calendar). The date of Nero's birth is the 15th of
-    December 37, in the Julian Calendar, which is the 13th of December 37 in the proleptic Gregorian
-    Calendar.</li> <!-- This might not be true. I can't find a reference that gives his birthday
+    December 37, in the Julian Calendar, which is the 13th of December 37 in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian
+    calendar</a>.</li> <!-- This might not be true. I can't find a reference that gives his birthday
     with an explicit statement about the calendar being used. However, it seems unlikely that it
     would be given in the Gregorian calendar, so I assume sites use the Julian one. -->
 
@@ -5623,9 +5634,10 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
   1970. Consecutive weeks are numbered sequentially. The week before the number 1 week in a
   week-year is the last week in the previous week-year, and vice versa. <a href=#refsGREGORIAN>[GREGORIAN]</a></p>
 
+<!--CLEANUP-->
   <p>A week-year with a number <var title="">year</var> has 53 weeks if it corresponds to either a
-  year <var title="">year</var> in the proleptic Gregorian calendar that has a Thursday as its first
-  day (January 1st), or a year <var title="">year</var> in the proleptic Gregorian calendar that has
+  year <var title="">year</var> in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian calendar</a> that has a Thursday as its first
+  day (January 1st), or a year <var title="">year</var> in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian calendar</a> that has
   a Wednesday as its first day (January 1st) and where <var title="">year</var> is a number
   divisible by 400, or a number divisible by 4 but not by 100. All other week-years have 52
   weeks.</p>
@@ -5634,7 +5646,7 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
   of the last day of a week-year with 52 weeks is 52.</p>
 
   <p class=note>The week-year number of a particular day can be different than the number of the
-  year that contains that day in the proleptic Gregorian calendar. The first week in a week-year
+  year that contains that day in the <a href=#proleptic-gregorian-calendar>proleptic Gregorian calendar</a>. The first week in a week-year
   <var title="">y</var> is the week that contains the first Thursday of the Gregorian year <var title="">y</var>.</p>
 
   <p class=note>For modern purposes, a <a href=#concept-week title=concept-week>week</a> as defined here is

diff --git a/source b/source
@@ -4056,6 +4056,12 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   </div>
 
+  <p>Where this specification refers to the <dfn>proleptic Gregorian calendar</dfn>, it means the
+  modern Gregorian calendar, extrapolated backwards to year 1. A date in the <span>proleptic
+  Gregorian calendar</span>, sometimes explicitly referred to as a <dfn>proleptic-Gregorian
+  date</dfn>, is one that is described using that calendar even if that calendar was not in use at
+  the time (or place) in question. <a href="#refsGREGORIAN">[GREGORIAN]</a></p>
+
   <p class="note">The use of the Gregorian calendar as the wire format in this specification is an
   arbitrary choice resulting from the cultural biases of those involved in the decision. See also
   the section discussing <a href="#input-author-notes">date, time, and number formats</a> in forms
@@ -4065,7 +4071,8 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5>Months</h5>
 
-  <p>A <dfn title="concept-month">month</dfn> consists of a specific proleptic Gregorian date with
+<!--CLEANUP-->
+  <p>A <dfn title="concept-month">month</dfn> consists of a specific <span>proleptic-Gregorian date</span> with
   no time-zone information and no date information beyond a year and a month. <a
   href="#refsGREGORIAN">[GREGORIAN]</a></p>
 
@@ -4142,7 +4149,8 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5>Dates</h5>
 
-  <p>A <dfn title="concept-date">date</dfn> consists of a specific proleptic Gregorian date with no
+<!--CLEANUP-->
+  <p>A <dfn title="concept-date">date</dfn> consists of a specific <span>proleptic-Gregorian date</span> with no
   time-zone information, consisting of a year, a month, and a day. <a
   href="#refsGREGORIAN">[GREGORIAN]</a></p>
 
@@ -4464,8 +4472,9 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5>Local dates and times</h5>
 
+<!--CLEANUP-->
   <p>A <dfn title="concept-datetime-local">local date and time</dfn> consists of a specific
-  proleptic Gregorian date, consisting of a year, a month, and a day, and a time, consisting of an
+  <span>proleptic-Gregorian date</span>, consisting of a year, a month, and a day, and a time, consisting of an
   hour, a minute, a second, and a fraction of a second, but expressed without a time zone. <a
   href="#refsGREGORIAN">[GREGORIAN]</a></p>
 
@@ -4716,8 +4725,9 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   <h5>Global dates and times</h5>
 
-  <p>A <dfn title="concept-datetime">global date and time</dfn> consists of a specific proleptic
-  Gregorian date, consisting of a year, a month, and a day, and a time, consisting of an hour, a
+<!--CLEANUP-->
+  <p>A <dfn title="concept-datetime">global date and time</dfn> consists of a specific <span>proleptic-Gregorian
+  date</span>, consisting of a year, a month, and a day, and a time, consisting of an hour, a
   minute, a second, and a fraction of a second, expressed with a time-zone offset, consisting of a
   signed number of hours and minutes. <a href="#refsGREGORIAN">[GREGORIAN]</a></p>
 
@@ -4779,12 +4789,13 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
     character. The string "<code title="">2001-12-21&nbsp;&nbsp;12:00Z</code>" (with two spaces
     between the components) would not be parsed successfully.</li>
 
+<!--CLEANUP-->
     <li>To unambiguously identify a moment in time prior to the introduction of the Gregorian
     calendar (insofar as moments in time before the formation of UTC can be unambiguously
     identified), the date has to be first converted to the Gregorian calendar from the calendar in
     use at the time (e.g. from the Julian calendar). The date of Nero's birth is the 15th of
-    December 37, in the Julian Calendar, which is the 13th of December 37 in the proleptic Gregorian
-    Calendar.</li> <!-- This might not be true. I can't find a reference that gives his birthday
+    December 37, in the Julian Calendar, which is the 13th of December 37 in the <span>proleptic Gregorian
+    calendar</span>.</li> <!-- This might not be true. I can't find a reference that gives his birthday
     with an explicit statement about the calendar being used. However, it seems unlikely that it
     would be given in the Gregorian calendar, so I assume sites use the Julian one. -->
 
@@ -4881,9 +4892,10 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
   week-year is the last week in the previous week-year, and vice versa. <a
   href="#refsGREGORIAN">[GREGORIAN]</a></p>
 
+<!--CLEANUP-->
   <p>A week-year with a number <var title="">year</var> has 53 weeks if it corresponds to either a
-  year <var title="">year</var> in the proleptic Gregorian calendar that has a Thursday as its first
-  day (January 1st), or a year <var title="">year</var> in the proleptic Gregorian calendar that has
+  year <var title="">year</var> in the <span>proleptic Gregorian calendar</span> that has a Thursday as its first
+  day (January 1st), or a year <var title="">year</var> in the <span>proleptic Gregorian calendar</span> that has
   a Wednesday as its first day (January 1st) and where <var title="">year</var> is a number
   divisible by 400, or a number divisible by 4 but not by 100. All other week-years have 52
   weeks.</p>
@@ -4892,7 +4904,7 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
   of the last day of a week-year with 52 weeks is 52.</p>
 
   <p class="note">The week-year number of a particular day can be different than the number of the
-  year that contains that day in the proleptic Gregorian calendar. The first week in a week-year
+  year that contains that day in the <span>proleptic Gregorian calendar</span>. The first week in a week-year
   <var title="">y</var> is the week that contains the first Thursday of the Gregorian year <var
   title="">y</var>.</p>