diff --git a/lib/doc/UserGuide.lyx b/lib/doc/UserGuide.lyx
index 652413568a..46b6912fc3 100644
--- a/lib/doc/UserGuide.lyx
+++ b/lib/doc/UserGuide.lyx
@@ -44814,7 +44814,7 @@ status collapsed
 
 \begin_layout Plain Layout
 
-http://unixhelp.ed.ac.uk/CGI/man-cgi?date
+http://man7.org/linux/man-pages/man1/date.1.html
 \end_layout
 
 \end_inset
diff --git a/lib/doc/de/UserGuide.lyx b/lib/doc/de/UserGuide.lyx
index 634d7d472a..772fd81f76 100644
--- a/lib/doc/de/UserGuide.lyx
+++ b/lib/doc/de/UserGuide.lyx
@@ -45030,7 +45030,7 @@ status collapsed
 
 \begin_layout Plain Layout
 
-http://unixhelp.ed.ac.uk/CGI/man-cgi?date
+http://man7.org/linux/man-pages/man1/date.1.html
 \end_layout
 
 \end_inset
diff --git a/lib/doc/es/UserGuide.lyx b/lib/doc/es/UserGuide.lyx
index 27e1254af6..1bc5d4e7f3 100644
--- a/lib/doc/es/UserGuide.lyx
+++ b/lib/doc/es/UserGuide.lyx
@@ -45754,7 +45754,7 @@ status collapsed
 
 \begin_layout Plain Layout
 
-http://unixhelp.ed.ac.uk/CGI/man-cgi?date
+http://man7.org/linux/man-pages/man1/date.1.html
 \end_layout
 
 \end_inset
diff --git a/lib/doc/fr/UserGuide.lyx b/lib/doc/fr/UserGuide.lyx
index c8be4317b1..35556bf45d 100644
--- a/lib/doc/fr/UserGuide.lyx
+++ b/lib/doc/fr/UserGuide.lyx
@@ -47283,7 +47283,7 @@ status collapsed
 
 \begin_layout Plain Layout
 
-http://unixhelp.ed.ac.uk/CGI/man-cgi?date
+http://man7.org/linux/man-pages/man1/date.1.html
 \end_layout
 
 \end_inset
diff --git a/lib/doc/id/UserGuide.lyx b/lib/doc/id/UserGuide.lyx
index ff932356ec..86e48b12b9 100644
--- a/lib/doc/id/UserGuide.lyx
+++ b/lib/doc/id/UserGuide.lyx
@@ -47197,7 +47197,7 @@ status collapsed
 
 \begin_layout Plain Layout
 
-http://unixhelp.ed.ac.uk/CGI/man-cgi?date
+http://man7.org/linux/man-pages/man1/date.1.html
 \end_layout
 
 \end_inset
diff --git a/lib/doc/ja/UserGuide.lyx b/lib/doc/ja/UserGuide.lyx
index 30f5e95fec..5216eab051 100644
--- a/lib/doc/ja/UserGuide.lyx
+++ b/lib/doc/ja/UserGuide.lyx
@@ -38639,7 +38639,7 @@ status collapsed
 
 \begin_layout Plain Layout
 
-http://unixhelp.ed.ac.uk/CGI/man-cgi?date
+http://man7.org/linux/man-pages/man1/date.1.html
 \end_layout
 
 \end_inset