diff --git a/CHANGES.md b/CHANGES.md
index 7c44b41..6c88bf7 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,40 +1,66 @@
 # CHANGES to the IdRel package
 
-## 2.49 -> 2.51 for GAP 4.16.0 (06/08/26)
+## 2.51 (2026-08-06)
+
+For GAP 4.16.0.
+
  * (06/08/26) fixed two bugs described in issue #28 (Robynn Corveleyn)
               added new test file robynn.tst
 
-## 2.48 -> 2.49 for GAP 4.15.0 (02/10/25)
+## 2.49 (2025-10-02)
+
+For GAP 4.15.0.
+
  * (01/10/25) fixed long-standing error in RootIdentities
               which finally enables Merve Simsek's example to complete.
  * (13/08/25) replaced DeclareGlobalFunction etc.
 
-## 2.47 -> 2.48 for GAP 4.13.1 (27/08/24) 
+## 2.48 (2024-08-27)
+
+For GAP 4.13.1.
+
  * (27/08/24) small fix in MonoidPresentationFpGroup method
 
-## 2.46 -> 2.47 for GAP 4.13.1 (02/06/24) 
+## 2.47 (2024-06-02)
+
+For GAP 4.13.1.
+
  * (02/06/24) small fix in rws.tst - order of elq8 changed in gapdev
 
-## 2.45 -> 2.46 for GAP 4.12.2 (23/01/24) 
+## 2.46 (2024-01-23)
+
+For GAP 4.12.2.
+
  * (23/01/24) minor changes; correct email address
 
-## 2.44 -> 2.45 for GAP 4.12.2 (09/02/23) 
+## 2.45 (2023-02-09)
+
+For GAP 4.12.2.
+
  * (23/12/22) changed email address and other personal details
 
-## 2.43 -> 2.44 for GAP 4.11.1 (04/06/22) 
+## 2.44 (2022-06-04)
+
+For GAP 4.11.1.
+
  * (04/06/22) extensive revision of idrels.* adding a large number 
               of operations for log sequences and identities
  * (23/11/21) renamed the test files; revised Chapter 2 
  * (02/11/21) introduced PrintUsingLabels and other Print commands 
 
-## 2.42 -> 2.43 for GAP 4.10.1 (08/04/21) 
+## 2.43 (2021-04-08)
+
+For GAP 4.10.1.
+
  * (08/04/21) Switch CI to use GitHub Actions 
  * (16/02/19) added License field in PackageInfo.g 
 
-## 2.41 -> 2.42  (13/09/2018)
+## 2.42 (2018-09-13)
+
  * (13/09/18) Replaced PrintOneItemPerLine(L) with Perform(L,Display)
-	
-## 2.38 -> 2.41  (19/03/2018)
+
+## 2.41 (2018-03-19)
+
  * (18/03/18) large number of functions edited and renamed and tests altered: 
               IdentitiesAmongRelators now returns group relator sequences 
               and the module polynomials are available as IdentityYSequences 
@@ -44,7 +70,8 @@
  * (13/02/18) added scripts/* for Travis tests 
  * (12/01/18) now using AutoDoc to build the manual 
 
-## 2.34 -> 2.38  (15/12/2017)
+## 2.38 (2017-12-15)
+
  * (15/12/17) removed examples/*.g from git but saved some in new /expt 
  * (08/08/17) testall.g copied to testing.g; testall now calls TestDirectory
  * (11/07/17) split off method for PartialElementsOfMonoidPresentation 
@@ -61,7 +88,8 @@
  * (21/12/16) added MonoidGeneratorsFpGroup
  * (15/11/16) added ArrangementOfMonoidGenerators to allow various orders  
 
-## 2.32 -> 2.34  (20/10/2016)
+## 2.34 (2016-10-20)
+
  * (18/10/16) now using bibliography file `bib.xml` of type `bibxmlext.dtd`
  * (10/10/16) changed package releases to <https://gap-packages.github.io/idrel>
  * (18/02/16) removed date/version info from file headers 
@@ -69,57 +97,69 @@
  * (28/10/15) added MathJax to `makedocrel.g` 
  * (02/09/15) major edits to `README`, including GitHub issues link 
 
-## 2.31 -> 2.32  (24/08/2015)
+## 2.32 (2015-08-24)
+
  * (24/08/15) packed up version 2.32 prior to move from Bitbucket to GitHub 
  * (24/08/15) added PrintObj method for monoid presentations 
 
-## 2.21 -> 2.31  (01/06/2015)
+## 2.31 (2015-06-01)
+
  * (01/06/15) `PackageInfo.g` : IdRel is now an accepted package 
  * (01/06/15) converted the bibliography to BibXMLext format 
               and added an URL to Anne's thesis (`heyworth.ps.gz`)  
 
-## 2.14 -> 2.21  (10/12/2014)
+## 2.21 (2014-12-10)
+
  * (10/12/14) changed package home to <pages.bangor.ac.uk/~mas023/chda/idrel/>
  * (10/12/14) started a bitbucket repository for idrel 
 
-## 2.12 -> 2.14  (11/01/2013)
+## 2.14 (2013-01-11)
+
  * (11/01/13) changed output in tests due to changes for GAP 4.6 
 
-## 2.11 -> 2.12  (25/04/2012)
+## 2.12 (2012-04-25)
+
  * (23/04/12) replaced ReadTest by Test in `tst/testall.g` 
  * (28/01/12) corrected typo in manual reported by David Callan 
               now using package directory in the format `../idrel-2.12/` 
               and archive files in the format `idrel-2.12.tar` 
 
-## 2.08 -> 2.11  (21/09/2011)
+## 2.11 (2011-09-21)
+
  * (20/09/11) new version of `makedocrel.g` for building the manual 
  * (17/09/11) Shortened the banner. 
  * (16/08/11) Renamed subdirectory `idrel/gap` as `idrel/lib` 
 
-## 2.07 -> 2.08  (06/09/2011)
+## 2.08 (2011-09-06)
+
  * (16/08/11) Changed directory for archive to `.../chda/gap4r5/idrel/` 
 
-## 2.06 -> 2.07  (04/06/2011)
+## 2.07 (2011-06-04)
+
  * (04/06/11) Changed Generators to GeneratorsOfModulePoly 
 
-## 2.05 -> 2.06  (08/05/2011)
+## 2.06 (2011-05-08)
+
  * (08/05/11) Preparing version to be released with GAP4.5. 
  * (18/04/10) Moved IdRel development to IMac at home, and started v.2.06.
 
-## 2.04 -> 2.05  (21/11/2008)
+## 2.05 (2008-11-21)
+
  * (19/11/08) GapDoc relegated to "suggested other packages".
 
-## 2.03 -> 2.04  (14/11/2008)
+## 2.04 (2008-11-14)
+
  * added GNU General Public License declaration 
  * added a test file, `tst/idrel_manual.tst`, 
  * fixed a bug in RootIdentities, 
  * several changes to the manual, which now agrees with the test file.
 
-## 2.02 -> 2.03  (09/10/2007)
+## 2.03 (2007-10-09)
+
  * started this CHANGES file 
  * new email address for Anne 
 
-# History up to version 2.02
+### History up to version 2.02
  * (07/05/97)?  package started: ?
  * (12/12/00)?  version 1.001 published in Anne Heyworth's thesis
  * (06/10/05)   version 2.01 prepared for GAP 4.4