diff --git a/grmi/Date.go b/grmi/Date.go
new file mode 100644
index 0000000..b73e111
--- /dev/null
+++ b/grmi/Date.go
@@ -0,0 +1,31 @@
+package grmi
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+type Date time.Time
+
+func (self Date) MarshalJSON() ([]byte, error) {
+	return []byte(fmt.Sprintf("\"%s\"", time.Time(self).Format(URLDateFormat))), nil
+}
+
+func (self *Date) UnmarshalJSON(data []byte) error {
+	var jsonString string
+	err := json.Unmarshal(data, &jsonString)
+	if err != nil {
+		return err
+	}
+	result, err := time.Parse(URLDateFormat, jsonString)
+	if err != nil {
+		return err
+	}
+	*self = Date(result)
+	return nil
+}
+
+func (self *Date) Restore() time.Time {
+	return time.Time(*self)
+}
diff --git a/grmi/grmi.go b/grmi/grmi.go
index 25c3fd3..e59f779 100644
--- a/grmi/grmi.go
+++ b/grmi/grmi.go
@@ -15,6 +15,7 @@ type GoType int
 
 const (
 	URLDateTimeFormat = "20060102150405"
+	URLDateFormat     = "20060102"
 )
 
 const (
@@ -30,6 +31,7 @@ const (
 	TypeUint64
 	TypeFloat32
 	TypeFloat64
+	TypeDate
 	TypeDateTime
 	TypeBool
 	TypeString