diff --git a/api/next/52746.txt b/api/next/52746.txt
new file mode 100644
index 0000000000..d6c3bd2749
--- /dev/null
+++ b/api/next/52746.txt
@@ -0,0 +1,6 @@
+pkg time, const DateOnly = "2006-01-02" #52746
+pkg time, const DateOnly ideal-string #52746
+pkg time, const DateTime = "2006-01-02 15:04:05" #52746
+pkg time, const DateTime ideal-string #52746
+pkg time, const TimeOnly = "15:04:05" #52746
+pkg time, const TimeOnly ideal-string #52746
diff --git a/src/time/format.go b/src/time/format.go
index 8431ff89b4..61a9eb3301 100644
--- a/src/time/format.go
+++ b/src/time/format.go
@@ -116,6 +116,9 @@ const (
 	StampMilli = "Jan _2 15:04:05.000"
 	StampMicro = "Jan _2 15:04:05.000000"
 	StampNano  = "Jan _2 15:04:05.000000000"
+	DateTime   = "2006-01-02 15:04:05"
+	DateOnly   = "2006-01-02"
+	TimeOnly   = "15:04:05"
 )
 
 const (
diff --git a/src/time/format_test.go b/src/time/format_test.go
index 9ae2b8017a..fa8c846686 100644
--- a/src/time/format_test.go
+++ b/src/time/format_test.go
@@ -115,6 +115,9 @@ var formatTests = []FormatTest{
 	{"StampMilli", StampMilli, "Feb  4 21:00:57.012"},
 	{"StampMicro", StampMicro, "Feb  4 21:00:57.012345"},
 	{"StampNano", StampNano, "Feb  4 21:00:57.012345600"},
+	{"DateTime", DateTime, "2009-02-04 21:00:57"},
+	{"DateOnly", DateOnly, "2009-02-04"},
+	{"TimeOnly", TimeOnly, "21:00:57"},
 	{"YearDay", "Jan  2 002 __2 2", "Feb  4 035  35 4"},
 	{"Year", "2006 6 06 _6 __6 ___6", "2009 6 09 _6 __6 ___6"},
 	{"Month", "Jan January 1 01 _1", "Feb February 2 02 _2"},