diff --git a/bin/timeout/timeout.1 b/bin/timeout/timeout.1
--- a/bin/timeout/timeout.1
+++ b/bin/timeout/timeout.1
@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd June 26, 2023
+.Dd June 17, 2024
 .Dt TIMEOUT 1
 .Os
 .Sh NAME
@@ -195,6 +195,12 @@
 .Xr nohup 1 ,
 .Xr signal 3 ,
 .Xr daemon 8
+.Sh STANDARDS
+The
+.Nm
+utility is compliant with the
+.St -p1003.1-2024
+specification.
 .Sh HISTORY
 The
 .Nm
diff --git a/contrib/mandoc/st.c b/contrib/mandoc/st.c
--- a/contrib/mandoc/st.c
+++ b/contrib/mandoc/st.c
@@ -37,6 +37,7 @@
 LINE("-p1003.1-2001",	"IEEE Std 1003.1-2001 (\\(lqPOSIX.1\\(rq)")
 LINE("-p1003.1-2004",	"IEEE Std 1003.1-2004 (\\(lqPOSIX.1\\(rq)")
 LINE("-p1003.1-2008",	"IEEE Std 1003.1-2008 (\\(lqPOSIX.1\\(rq)")
+LINE("-p1003.1-2024",	"IEEE Std 1003.1-2024 (\\(lqPOSIX.1\\(rq)")
 LINE("-p1003.1-2013",	"IEEE Std 1003.1-2008, 2013 Edition (\\(LqPOSIX.1\\(Rq)")
 LINE("-p1003.1-2016",	"IEEE Std 1003.1-2008, 2016 Edition (\\(LqPOSIX.1\\(Rq)")
 LINE("-p1003.1",	"IEEE Std 1003.1 (\\(lqPOSIX.1\\(rq)")