2 files changed, 3 insertions, 0 deletions
diff --git a/mdoc.7 b/mdoc.7
index c669d3f3..e10659da 100644
--- a/mdoc.7
+++ b/mdoc.7
@@ -2876,6 +2876,8 @@ The following standards are recognised:
 .St -ieee754
 .It \-iso8802-3
 .St -iso8802-3
+.It \-iso8601
+.St -iso8601
 .It \-ieee1275-94
 .St -ieee1275-94
 .It \-xpg3
diff --git a/st.in b/st.in
index 0e303789..00c13b9b 100644
--- a/st.in
+++ b/st.in
@@ -59,6 +59,7 @@ LINE("-ansiC-89",	"ANSI X3.159-1989 (\\(lqANSI\\~C89\\(rq)")
 LINE("-ansiC-99",	"ANSI/ISO/IEC 9899-1999 (\\(lqANSI\\~C99\\(rq)")
 LINE("-ieee754",	"IEEE Std 754-1985")
 LINE("-iso8802-3",	"ISO 8802-3: 1989")
+LINE("-iso8601",	"ISO 8601")
 LINE("-ieee1275-94",	"IEEE Std 1275-1994 (\\(lqOpen Firmware\\(rq)")
 LINE("-xpg3",		"X/Open Portability Guide Issue\\~3 (\\(lqXPG3\\(rq)")
 LINE("-xpg4",		"X/Open Portability Guide Issue\\~4 (\\(lqXPG4\\(rq)")