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CLDR-18369 Revise era codes to match Temporal specification #4519

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Merged
merged 1 commit into from
Aug 9, 2025
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CLDR-18369 Revise era codes to match Temporal specification #4519

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2 changes: 1 addition & 1 deletion common/dtd/ldmlSupplemental.dtd
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Original file line number Diff line number Diff line change
Expand Up @@ -275,7 +275,7 @@ CLDR data files are interpreted according to the LDML specification (http://unic
<!--@MATCH:time/yyyy-MM-dd-->
<!--@VALUE-->
<!ATTLIST era code NMTOKEN #IMPLIED >
<!--@MATCH:regex/[a-z0-9]{3,8}(\-[a-z0-9]{3,8})*-->
<!--@MATCH:regex/[a-z0-9]{2,8}(\-[a-z0-9]{3,8})*-->
<!--@VALUE-->
<!ATTLIST era aliases NMTOKENS #IMPLIED >
<!--@MATCH:set/regex/[a-z0-9]{2,8}(\-[a-z0-9]{3,8})*-->
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50 changes: 25 additions & 25 deletions common/supplemental/supplementalData.xml
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Expand Up @@ -4304,8 +4304,8 @@ XXX Code for transations where no currency is involved
<calendar type="gregorian">
<calendarSystem type="solar" />
<eras>
<era type="0" end="0-12-31" code="gregory-inverse" aliases="bc bce"/>
<era type="1" start="1-01-01" code="gregory" aliases="ad ce"/>
<era type="0" end="0-12-31" code="bce" aliases="bc"/> <!-- Before Common Era, Before Christ -->
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@sffc why is type: 0 used for the backwards-counting, earlier era here, but is used for the forwards-counting, later era in most (all?) calendars below? Are 0 vs. 1 meaningful in any way?

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They are generally chronological with the exception of AH/BH, which had a whole discussion in #4581

<era type="1" start="1-01-01" code="ce" aliases="ad"/> <!-- Common Era, Anno Domini -->
</eras>
</calendar>
<calendar type="generic"/>
Expand Down Expand Up @@ -4557,96 +4557,96 @@ XXX Code for transations where no currency is involved
<calendar type="islamic">
<calendarSystem type="lunar" />
<eras>
<era type="0" start="622-07-19" code="islamic" aliases="ah"/>
<era type="1" end="622-07-18" code="islamic-inverse" aliases="bh"/>
<era type="0" start="622-07-19" code="ah"/> <!-- Anno Hegirae -->
<era type="1" end="622-07-18" code="bh"/> <!-- Before Hijrah -->
</eras>
</calendar>
<calendar type="islamic-civil">
<calendarSystem type="lunar" />
<eras>
<era type="0" start="622-07-19" code="islamic-civil" aliases="islamicc ah"/>
<era type="1" end="622-07-18" code="islamic-civil-inverse" aliases="bh"/>
<era type="0" start="622-07-19" code="ah"/> <!-- Anno Hegirae -->
<era type="1" end="622-07-18" code="bh"/> <!-- Before Hijrah -->
</eras>
</calendar>
<calendar type="islamic-rgsa">
<calendarSystem type="lunar" />
<eras>
<era type="0" start="622-07-19" code="islamic-rgsa" aliases="ah"/>
<era type="1" end="622-07-18" code="islamic-rgsa-inverse" aliases="bh"/>
<era type="0" start="622-07-19" code="ah"/> <!-- Anno Hegirae -->
<era type="1" end="622-07-18" code="bh"/> <!-- Before Hijrah -->
</eras>
</calendar>
<calendar type="islamic-tbla">
<calendarSystem type="lunar" />
<eras>
<era type="0" start="622-07-18" code="islamic-tbla" aliases="ah"/>
<era type="1" end="622-07-17" code="islamic-tbla-inverse" aliases="bh"/>
<era type="0" start="622-07-18" code="ah"/> <!-- Anno Hegirae -->
<era type="1" end="622-07-17" code="bh"/> <!-- Before Hijrah -->
</eras>
</calendar>
<calendar type="islamic-umalqura">
<calendarSystem type="lunar" />
<eras>
<era type="0" start="622-07-19" code="islamic-umalqura" aliases="ah"/>
<era type="1" end="622-07-18" code="islamic-umalqura-inverse" aliases="bh"/>
<era type="0" start="622-07-19" code="ah"/> <!-- Anno Hegirae -->
<era type="1" end="622-07-18" code="bh"/> <!-- Before Hijrah -->
</eras>
</calendar>
<calendar type="chinese">
<calendarSystem type="lunisolar"/>
<eras>
<era type="0" start="-2636-02-15" code="chinese"/> <!-- 'sequential' year -->
<era type="0" start="-2636-02-15"/> <!-- 'sequential' year -->
</eras>
</calendar>
<calendar type="hebrew">
<calendarSystem type="lunisolar"/>
<eras>
<era type="0" start="-3760-09-07" code="hebrew" aliases="am"/>
<era type="0" start="-3760-09-07" code="am"/> <!-- Anno Mundi -->
</eras>
</calendar>
<calendar type="buddhist">
<calendarSystem type="solar" />
<eras>
<era type="0" start="-542-01-01" code="buddhist" aliases="be"/>
<era type="0" start="-542-01-01" code="be"/> <!-- Buddhist Era -->
</eras>
</calendar>
<calendar type="coptic">
<calendarSystem type="other"/>
<eras>
<era type="0" end="284-08-28" code="coptic-inverse"/>
<era type="1" start="284-08-29" code="coptic"/>
<era type="0" end="284-08-28" code="bd"/> <!-- Before Diocletian. NOTE: No evidence this era is used -->
<era type="1" start="284-08-29" code="am"/> <!-- Anno Martyrum -->
</eras>
</calendar>
<calendar type="persian">
<calendarSystem type="solar"/>
<eras>
<era type="0" start="622-03-21" code="persian" aliases="ap"/>
<era type="0" start="622-03-21" code="ap"/> <!-- Anno Persico -->
</eras>
</calendar>
<calendar type="dangi">
<calendarSystem type="lunisolar"/>
<eras>
<era type="0" start="-2332-02-15" code="dangi"/> <!-- 'sequential' year -->
<era type="0" start="-2332-02-15"/> <!-- 'sequential' year -->
</eras>
</calendar>
<calendar type="ethiopic">
<calendarSystem type="other"/>
<eras>
<era type="0" start="-5492-07-17" code="ethioaa" aliases="ethiopic-amete-alem mundi"/>
<era type="1" start="8-08-27" code="ethiopic" aliases="incar"/>
<era type="0" start="-5492-07-17" code="aa"/> <!-- Amete Alem -->
<era type="1" start="8-08-27" code="am"/> <!-- Amete Mihret -->
</eras>
</calendar>
<calendar type="ethiopic-amete-alem">
<eras>
<era type="0" start="-5492-07-17" code="ethioaa" aliases="ethiopic-amete-alem mundi"/>
<era type="0" start="-5492-07-17" code="aa"/> <!-- Amete Alem -->
</eras>
</calendar>
<calendar type="indian">
<eras>
<era type="0" start="79-03-22" code="indian" aliases="saka"/>
<era type="0" start="79-03-22" code="shaka"/>
</eras>
</calendar>
<calendar type="roc">
<eras>
<era type="0" end="1911-12-31" code="roc-inverse" aliases="before-roc"/>
<era type="1" start="1912-01-01" code="roc" aliases="minguo"/>
<era type="0" end="1911-12-31" code="broc"/>
<era type="1" start="1912-01-01" code="roc"/>
</eras>
</calendar>

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