Check in the pristine copy of ICU 4.6...

icu46/source/data/xml/main/bg.xml

Index: icu46/source/data/xml/main/bg.xml
===================================================================
--- icu46/source/data/xml/main/bg.xml	(revision 0)
+++ icu46/source/data/xml/main/bg.xml	(revision 0)
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!--
+ Copyright (c) 2010 International Business Machines Corporation and others. All rights reserved.
+-->
+<!DOCTYPE ldml SYSTEM "http://www.unicode.org/repos/cldr/trunk/common/dtd/ldml.dtd"
+[
+   <!ENTITY % icu SYSTEM "http://www.unicode.org/repos/cldr/trunk/common/dtd/ldmlICU.dtd">
+   %icu;
+]
+>
+<ldml>
+	<identity>
+		<version number="$Revision: 1.23 $"/>
+		<generation date="$Date: 2008/05/25 01:05:50 $"/>
+		<language type="bg"/> 
+	</identity>
+	<characters>
+		<special xmlns:icu="http://www.icu-project.org/">
+			<icu:scripts>
+				<icu:script type="1">Cyrl</icu:script>
+			</icu:scripts>
+		</special>
+	</characters>
+	<dates>
+		<calendars>
+			<calendar type="gregorian">
+				<dayPeriods>
+					<dayPeriodContext type="format">
+						<dayPeriodWidth type="wide">
+							<dayPeriod type="am">пр. об.</dayPeriod>
+							<dayPeriod type="pm">сл. об.</dayPeriod>
+						</dayPeriodWidth>
+					</dayPeriodContext>
+				</dayPeriods>
+			</calendar>
+		</calendars>
+	</dates>
+</ldml>
+