diff --git a/README.md b/README.md
index 60c80b2e8..d37c9c9d4 100644
--- a/README.md
+++ b/README.md
@@ -59,8 +59,8 @@ are tentative.
 | HDF4 3.1 | Fix memory issues and update documentation to match the software
 | HDF4 4.0 | Drop FORTRAN 77 support, Drop netCDF 2.3.2 API + tools, Unified library (maybe) |
 
-HDF4 3.1 is scheduled to be released at the end of May, 2025.
-HDF4 4.0 (Tentatively Feb, 2026)
+HDF4 3.1 was released at the end of Jun, 2025.
+HDF4 4.0 (Tentatively Jun, 2026)
 * We will drop support for FORTRAN 77 and move to modern Fortran (2003 or 2008)
 * HDF4 includes an ancient netCDF 2.3.2 API along with HDF4-built ncdump and ncgen tools. These will be removed in 4.0 and are available by installing the [netCDF-C library](https://github.com/Unidata/netcdf-c).
 * (maybe) libdf and libmfhdf will be merged into a single libhdf4 library, Fortran will be built as a separate library
@@ -70,7 +70,7 @@ and bring HDF4 in line with HDF5's build practices. This should allow HDF4
 to work better with modern systems and compilers and be more easily
 maintained.
 
-There will be one more release in the HDF4 3.x series, 3.1, then the 4.3 maintenance line will be retired when HDF4 4.0 releases.
+Release 3.1 is the last release in the HDF4 3.x series.  The HDF4 3.x maintenance line will be retired when HDF4 4.0 releases.
 
 
 SNAPSHOTS, PREVIOUS RELEASES AND SOURCE CODE
diff --git a/doc/img/release-schedule.plantuml b/doc/img/release-schedule.plantuml
index e41b8cc08..d8dd0fb14 100644
--- a/doc/img/release-schedule.plantuml
+++ b/doc/img/release-schedule.plantuml
@@ -17,8 +17,8 @@ Project starts 2023-01-01
 [4.3.1] displays on same row as [4.3.0]
 [4.3] is colored in #F08FFF
 
-[4.4] starts 2025-01-01 and lasts 65 weeks
-[4.4.0] happens 2026-02-28
+[4.4] starts 2025-01-01 and lasts 78 weeks
+[4.4.0] happens 2026-06-30
 [4.4] is colored in #88AADD
 
 @endgantt
diff --git a/doc/img/release-schedule.png b/doc/img/release-schedule.png
index 75282c58f..cf7cfd466 100644
Binary files a/doc/img/release-schedule.png and b/doc/img/release-schedule.png differ