Fix a changelog entry

- Add patch for a test failure

ocaml-calendar-timezone-test.patch

@@ -0,0 +1,33 @@
+When the tests are executed in Mountain Standard Time, the timezone test fails:
+
+ASSERT gap g6 Local = gap g6 UTC + gap UTC Local
+File "tests/test_timezone.ml", line 37, character 2:
+FAIL gap g6 Local = gap g6 UTC + gap UTC Local
+
+   Expected: `11'
+   Received: `-13'
+
+--- calendar-3.0.0/tests/test_timezone.ml.orig	2022-10-11 09:39:06.000000000 -0600
++++ calendar-3.0.0/tests/test_timezone.ml	2024-12-13 11:20:28.349298798 -0700
+@@ -27,6 +27,12 @@ open Time_Zone;;
+ 
+ let tz = Alcotest.testable (Fmt.always "timezone") (=) ;;
+ 
++let make_in_bounds x =
++  let y = x mod 24 in
++  if y < -12 then y + 24
++  else if y > 11 then y - 24
++  else y
++
+ let test () =
+   change UTC;
+   Alcotest.(check tz) "current () = UTC" UTC (current ());
+@@ -36,7 +42,7 @@ let test () =
+   let g6 = UTC_Plus 6 in
+   Alcotest.(check int)
+     "gap g6 Local = gap g6 UTC + gap UTC Local"
+-    (gap g6 Local) (gap g6 UTC + gap UTC Local);
++    (gap g6 Local) (make_in_bounds (gap g6 UTC + gap UTC Local));
+   Gen_test.test_exn (lazy (change (UTC_Plus 13))) "change 13";
+   Gen_test.test_exn (lazy (change (UTC_Plus (-15)))) "change (-15)";
+   change (UTC_Plus 4);

ocaml-calendar.spec

@@ -15,13 +15,15 @@ ExcludeArch: %{ix86}
 Name:           ocaml-calendar
 Epoch:          1
 Version:        3.0.0
-Release:        13%{?dist}
+Release:        19%{?dist}
 Summary:        Objective Caml library for managing dates and times
 License:        LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception
 
 URL:            https://ocaml-community.github.io/calendar/
 VCS:            git:%{giturl}.git
 Source0:        %{giturl}/archive/v%{version}/calendar-%{version}.tar.gz
+# Work around https://github.com/ocaml-community/calendar/issues/43
+Patch:          %{name}-timezone-test.patch
 
 BuildRequires:  ocaml >= 4.03
 BuildRequires:  ocaml-dune >= 1.0
@@ -75,6 +77,25 @@ developing applications that use %{name}.
 
 
 %changelog
+* Mon Oct 13 2025 Richard W.M. Jones <rjones@redhat.com> - 1:3.0.0-19
+- OCaml 5.4.0 rebuild
+
+* Thu Jul 24 2025 Fedora Release Engineering <releng@fedoraproject.org> - 1:3.0.0-18
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
+* Sat Jul 12 2025 Jerry James <loganjerry@gmail.com> - 1:3.0.0-17
+- Rebuild to fix OCaml dependencies
+
+* Fri Jan 17 2025 Fedora Release Engineering <releng@fedoraproject.org> - 1:3.0.0-16
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
+
+* Fri Jan 10 2025 Jerry James <loganjerry@gmail.com> - 1:3.0.0-15
+- OCaml 5.3.0 rebuild for Fedora 42
+- Add patch for a test failure
+
+* Thu Oct 03 2024 Richard W.M. Jones <rjones@redhat.com> - 1:3.0.0-14
+- Rebuild against ocaml-re 1.13.3 (RHBZ#2316105)
+
 * Thu Jul 18 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1:3.0.0-13
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild