diff --git a/doc/index.html b/doc/index.html
index c7bde8c..f9d5c78 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -3748,7 +3748,7 @@ If available, the version is detected as VV.RR.P.</p>
 <h4 id="_boost_lang_stdc"><a class="anchor" href="#_boost_lang_stdc"></a>4.3.3. <code>BOOST_LANG_STDC</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/C_(programming_language)">Standard C</a> language.
-If available, the year of the standard is detected as YYYY.MM.1 from the Epoc date.</p>
+If available, the year of the standard is detected as YYYY.MM.1 from the Epoch date.</p>
 </div>
 <table class="tableblock frame-all grid-all stretch">
 <colgroup>
@@ -3777,7 +3777,7 @@ If available, the year of the standard is detected as YYYY.MM.1 from the Epoc da
 <h4 id="_boost_lang_stdcpp"><a class="anchor" href="#_boost_lang_stdcpp"></a>4.3.4. <code>BOOST_LANG_STDCPP</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/C%2B%2B">Standard C++</a> language.
-If available, the year of the standard is detected as YYYY.MM.1 from the Epoc date.
+If available, the year of the standard is detected as YYYY.MM.1 from the Epoch date.
 Because of the way the C++ standardization process works the
 defined version year will not be the commonly known year of the standard.
 Specifically the defined versions are:</p>
@@ -3846,7 +3846,7 @@ Specifically the defined versions are:</p>
 <h4 id="_boost_lang_stdcppcli"><a class="anchor" href="#_boost_lang_stdcppcli"></a>4.3.5. <code>BOOST_LANG_STDCPPCLI</code></h4>
 <div class="paragraph">
 <p><a href="http://en.wikipedia.org/wiki/C%2B%2B/CLI">Standard C++/CLI</a> language.
-If available, the year of the standard is detected as YYYY.MM.1 from the Epoc date.</p>
+If available, the year of the standard is detected as YYYY.MM.1 from the Epoch date.</p>
 </div>
 <table class="tableblock frame-all grid-all stretch">
 <colgroup>
@@ -7313,4 +7313,4 @@ Joel Falcou for managing the review of this library.</p>
 </div>
 </div>
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/include/boost/predef/language/stdc.h b/include/boost/predef/language/stdc.h
index 94e30fe..8cbd6a1 100644
--- a/include/boost/predef/language/stdc.h
+++ b/include/boost/predef/language/stdc.h
@@ -15,7 +15,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 = `BOOST_LANG_STDC`
 
 http://en.wikipedia.org/wiki/C_(programming_language)[Standard C] language.
-If available, the year of the standard is detected as YYYY.MM.1 from the Epoc date.
+If available, the year of the standard is detected as YYYY.MM.1 from the Epoch date.
 
 [options="header"]
 |===
diff --git a/include/boost/predef/language/stdcpp.h b/include/boost/predef/language/stdcpp.h
index fc83431..daa14cf 100644
--- a/include/boost/predef/language/stdcpp.h
+++ b/include/boost/predef/language/stdcpp.h
@@ -15,7 +15,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 = `BOOST_LANG_STDCPP`
 
 http://en.wikipedia.org/wiki/C%2B%2B[Standard {CPP}] language.
-If available, the year of the standard is detected as YYYY.MM.1 from the Epoc date.
+If available, the year of the standard is detected as YYYY.MM.1 from the Epoch date.
 Because of the way the {CPP} standardization process works the
 defined version year will not be the commonly known year of the standard.
 Specifically the defined versions are:
@@ -61,7 +61,7 @@ Specifically the defined versions are:
 = `BOOST_LANG_STDCPPCLI`
 
 http://en.wikipedia.org/wiki/C%2B%2B/CLI[Standard {CPP}/CLI] language.
-If available, the year of the standard is detected as YYYY.MM.1 from the Epoc date.
+If available, the year of the standard is detected as YYYY.MM.1 from the Epoch date.
 
 [options="header"]
 |===