Index: head/share/man/man9/disk.9
===================================================================
--- head/share/man/man9/disk.9
+++ head/share/man/man9/disk.9
@@ -27,7 +27,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 3, 2017
+.Dd April 30, 2020
 .Dt DISK 9
 .Os
 .Sh NAME
@@ -241,6 +241,11 @@
 .Vt softc
 structure for this disk device.
 .El
+.Sh HISTORY
+The
+.Nm kernel disk storage API
+first appeard in
+.Fx 4.9 .
 .Sh SEE ALSO
 .Xr GEOM 4 ,
 .Xr devfs 5 ,
Index: head/share/man/man9/driver.9
===================================================================
--- head/share/man/man9/driver.9
+++ head/share/man/man9/driver.9
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 22, 2011
+.Dd April 30, 2020
 .Dt DRIVER 9
 .Os
 .Sh NAME
@@ -102,6 +102,11 @@
 can optionally call extra initialisation code in the driver by
 specifying an extra module event handler and argument as the last two
 arguments.
+.Sh HISTORY
+The
+.Nm
+framework first appeared in
+.Fx 2.2.7 .
 .Sh SEE ALSO
 .Xr devclass 9 ,
 .Xr device 9 ,
Index: head/share/man/man9/epoch.9
===================================================================
--- head/share/man/man9/epoch.9
+++ head/share/man/man9/epoch.9
@@ -26,7 +26,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 16, 2020
+.Dd April 30, 2020
 .Dt EPOCH 9
 .Os
 .Sh NAME
@@ -281,6 +281,11 @@
 .Nm
 kernel programming interface is under development and is subject to change.
 .El
+.Sh HISTORY
+The
+.Nm
+framework first appeard in
+.Fx 11.0 .
 .Sh SEE ALSO
 .Xr locking 9 ,
 .Xr mtx_pool 9 ,