diff --git a/LICENSE b/LICENSE
index 29081994b..dc95f93fd 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The Mercury implementation is free software.
 It is Copyright (C) 1993-2012 The University of Melbourne and
-Copyright (C) 2013-2025 The Mercury team.
+Copyright (C) 2013-2026 The Mercury team.
 
 The compiler and tools are distributed under the terms of the GNU
 General Public License.  See the file COPYING for copying permission.
diff --git a/compiler/print_help.m b/compiler/print_help.m
index 8839799cf..16a15d77e 100644
--- a/compiler/print_help.m
+++ b/compiler/print_help.m
@@ -1,7 +1,7 @@
 %---------------------------------------------------------------------------%
 % vim: ft=mercury ts=4 sw=4 et
 %---------------------------------------------------------------------------%
-% Copyright (C) 2025 The Mercury team.
+% Copyright (C) 2025-2026 The Mercury team.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
 %---------------------------------------------------------------------------%
@@ -120,7 +120,7 @@ compiler_id_line = "Name: mmc - Melbourne Mercury Compiler".
 
 copyright_notice_lines = [
     "Copyright (C) 1993-2012 The University of Melbourne",
-    "Copyright (C) 2013-2025 The Mercury team"
+    "Copyright (C) 2013-2026 The Mercury team"
 ].
 
 :- func long_usage_header_lines = list(string).
diff --git a/doc/mercury_faq.texi b/doc/mercury_faq.texi
index b7de3b830..5fd80fddb 100644
--- a/doc/mercury_faq.texi
+++ b/doc/mercury_faq.texi
@@ -26,7 +26,7 @@ This file is the Mercury Frequently Asked Questions List, version <VERSION>.
 It contains a list of frequently asked questions about Mercury, with answers.
 
 Copyright @copyright{} 1995--1997,1999,2001--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this FAQ list provided the copyright notice and this permission notice
@@ -57,7 +57,7 @@ into another language, under the above conditions for modified versions.
 @page
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1995--1997,1999,2001--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this FAQ list provided the copyright notice and this permission notice
diff --git a/doc/mercury_library_manual.texi b/doc/mercury_library_manual.texi
index 63d0eca7e..0e84948e9 100644
--- a/doc/mercury_library_manual.texi
+++ b/doc/mercury_library_manual.texi
@@ -16,7 +16,7 @@
 This file documents the Mercury standard library, version <VERSION>.
 
 Copyright @copyright{} 1995--1997,1999--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
@@ -47,7 +47,7 @@ into another language, under the above conditions for modified versions.
 @page
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1995--1997,1999--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
diff --git a/doc/mercury_reference_manual.texi b/doc/mercury_reference_manual.texi
index 014c976aa..25ce2b1ce 100644
--- a/doc/mercury_reference_manual.texi
+++ b/doc/mercury_reference_manual.texi
@@ -16,7 +16,7 @@
 This file documents the Mercury programming language, version <VERSION>.
 
 Copyright @copyright{} 1995--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
@@ -55,7 +55,7 @@ into another language, under the above conditions for modified versions.
 @page
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1995--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
diff --git a/doc/mercury_transition_guide.texi b/doc/mercury_transition_guide.texi
index be3a5d4b2..336a350c7 100644
--- a/doc/mercury_transition_guide.texi
+++ b/doc/mercury_transition_guide.texi
@@ -16,7 +16,7 @@
 This file is an aid for people porting Prolog programs to Mercury.
 
 Copyright @copyright{} 1995--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
@@ -47,7 +47,7 @@ into another language, under the above conditions for modified versions.
 @page
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1995--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
diff --git a/doc/mercury_user_guide.texi b/doc/mercury_user_guide.texi
index cdaa8bd48..1f5a87722 100644
--- a/doc/mercury_user_guide.texi
+++ b/doc/mercury_user_guide.texi
@@ -43,7 +43,7 @@
 This file documents the Mercury implementation, version <VERSION>.
 
 Copyright @copyright{} 1995--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
@@ -79,7 +79,7 @@ into another language, under the above conditions for modified versions.
 @page
 @vskip 0pt plus 1filll
 Copyright @copyright{} 1995--2012 The University of Melbourne.@*
-Copyright @copyright{} 2013--2025 The Mercury team.
+Copyright @copyright{} 2013--2026 The Mercury team.
 
 Permission is granted to make and distribute verbatim copies of
 this manual provided the copyright notice and this permission notice
diff --git a/profiler/mercury_profile.m b/profiler/mercury_profile.m
index f2466145d..51bc0619a 100644
--- a/profiler/mercury_profile.m
+++ b/profiler/mercury_profile.m
@@ -2,7 +2,7 @@
 % vim: ft=mercury ts=4 sw=4 et
 %---------------------------------------------------------------------------%
 % Copyright (C) 1995-1997, 1999, 2002, 2004-2012 The University of Melbourne.
-% Copyright (C) 2013, 2015-2025 The Mercury team.
+% Copyright (C) 2013, 2015-2026 The Mercury team.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
 %---------------------------------------------------------------------------%
@@ -162,7 +162,7 @@ long_usage(OutputStream, !IO) :-
 write_copyright_notice(OutputStream, !IO) :-
     io.write_strings(OutputStream, [
         "Copyright (C) 1995-2012 The University of Melbourne\n",
-        "Copyright (C) 2013-2025 The Mercury team\n"
+        "Copyright (C) 2013-2026 The Mercury team\n"
     ], !IO).
 
 %---------------------------------------------------------------------------%
diff --git a/slice/mcov.m b/slice/mcov.m
index f249fed86..170f2418b 100644
--- a/slice/mcov.m
+++ b/slice/mcov.m
@@ -2,7 +2,7 @@
 % vim: ft=mercury ts=4 sw=4 expandtab
 %---------------------------------------------------------------------------%
 % Copyright (C) 2006-2007, 2010-2012 The University of Melbourne.
-% Copyright (C) 2014-2016, 2020-2025 The Mercury team.
+% Copyright (C) 2014-2016, 2020-2026 The Mercury team.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
 %---------------------------------------------------------------------------%
@@ -511,7 +511,7 @@ long_usage(OutStream, !IO) :-
 write_copyright_notice(OutStream, !IO) :-
     io.write_strings(OutStream, [
         "Copyright (C) 2006-2012 The University of Melbourne\n",
-        "Copyright (C) 2013-2025 The Mercury team\n"
+        "Copyright (C) 2013-2026 The Mercury team\n"
     ], !IO).
 
 %---------------------------------------------------------------------------%
diff --git a/slice/mdice.m b/slice/mdice.m
index b7027a9f3..dbed45025 100644
--- a/slice/mdice.m
+++ b/slice/mdice.m
@@ -180,7 +180,7 @@ long_usage(OutStream, !IO) :-
 write_copyright_notice(OutStream, !IO) :-
     io.write_strings(OutStream, [
         "Copyright (C) 2005-2012 The University of Melbourne\n",
-        "Copyright (C) 2013-2025 The Mercury team\n"
+        "Copyright (C) 2013-2026 The Mercury team\n"
     ], !IO).
 
 %---------------------------------------------------------------------------%
diff --git a/slice/mslice.m b/slice/mslice.m
index 82b2b3b7d..4869e49d1 100644
--- a/slice/mslice.m
+++ b/slice/mslice.m
@@ -2,7 +2,7 @@
 % vim: ft=mercury ts=4 sw=4 expandtab
 %---------------------------------------------------------------------------%
 % Copyright (C) 2005-2006, 2012 The University of Melbourne.
-% Copyright (C) 2015-2016, 2019-2020, 2022-2025 The Mercury team.
+% Copyright (C) 2015-2016, 2019-2020, 2022-2026 The Mercury team.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
 %---------------------------------------------------------------------------%
@@ -175,7 +175,7 @@ long_usage(OutStream, !IO) :-
 write_copyright_notice(OutStream, !IO) :-
     io.write_strings(OutStream, [
         "Copyright (C) 2005-2012 The University of Melbourne\n",
-        "Copyright (C) 2013-2025 The Mercury team\n"
+        "Copyright (C) 2013-2026 The Mercury team\n"
     ], !IO).
 
 %---------------------------------------------------------------------------%
diff --git a/slice/mtc_diff.m b/slice/mtc_diff.m
index 3cedfbecd..c692b0907 100644
--- a/slice/mtc_diff.m
+++ b/slice/mtc_diff.m
@@ -2,7 +2,7 @@
 % vim: ft=mercury ts=4 sw=4 expandtab
 %---------------------------------------------------------------------------%
 % Copyright (C) 2006, 2012 The University of Melbourne.
-% Copyright (C) 2015-2017, 2019-2025 The Mercury team.
+% Copyright (C) 2015-2017, 2019-2026 The Mercury team.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
 %---------------------------------------------------------------------------%
@@ -176,7 +176,7 @@ long_usage(OutStream, !IO) :-
 write_copyright_notice(OutStream, !IO) :-
     io.write_strings(OutStream, [
         "Copyright (C) 2006-2012 The University of Melbourne\n",
-        "Copyright (C) 2013-2025 The Mercury team\n"
+        "Copyright (C) 2013-2026 The Mercury team\n"
     ], !IO).
 
 %---------------------------------------------------------------------------%
diff --git a/slice/mtc_union.m b/slice/mtc_union.m
index 1e9e29c14..5cc8b570e 100644
--- a/slice/mtc_union.m
+++ b/slice/mtc_union.m
@@ -2,7 +2,7 @@
 % vim: ft=mercury ts=4 sw=4 expandtab
 %---------------------------------------------------------------------------%
 % Copyright (C) 2005-2006, 2012 The University of Melbourne.
-% Copyright (C) 2015-2016, 2019-2025 The Mercury team.
+% Copyright (C) 2015-2016, 2019-2026 The Mercury team.
 % This file may only be copied under the terms of the GNU General
 % Public License - see the file COPYING in the Mercury distribution.
 %---------------------------------------------------------------------------%
@@ -174,7 +174,7 @@ long_usage(OutStream, !IO) :-
 write_copyright_notice(OutStream, !IO) :-
     io.write_strings(OutStream, [
         "Copyright (C) 2005-2012 The University of Melbourne\n",
-        "Copyright (C) 2013-2025 The Mercury team\n"
+        "Copyright (C) 2013-2026 The Mercury team\n"
     ], !IO).
 
 %---------------------------------------------------------------------------%
diff --git a/trace/mercury_trace_internal.c b/trace/mercury_trace_internal.c
index 635c59cea..fae11b6b2 100644
--- a/trace/mercury_trace_internal.c
+++ b/trace/mercury_trace_internal.c
@@ -1,7 +1,7 @@
 // vim: ts=4 sw=4 expandtab ft=c
 
 // Copyright (C) 1998-2012 The University of Melbourne.
-// Copyright (C) 2013-2025 The Mercury team.
+// Copyright (C) 2013-2026 The Mercury team.
 // This file is distributed under the terms specified in COPYING.LIB.
 
 // This file contains the top level of the code of the internal, in-process
@@ -271,7 +271,7 @@ MR_trace_event_internal(MR_TraceCmdInfo *cmd, MR_bool interactive,
 static const char MR_trace_banner[] =
 "Melbourne Mercury Debugger, mdb version %s.\n\
 Copyright 1998-2012 The University of Melbourne.\n\
-Copyright 2013-2025 The Mercury team.\n\
+Copyright 2013-2026 The Mercury team.\n\
 mdb is free software; there is absolutely no warranty for mdb.\n";
 
 static FILE *