diff --git a/oform/Role.js b/oform/Role.js
index 7c211ac..4e14762 100644
--- a/oform/Role.js
+++ b/oform/Role.js
@@ -84,8 +84,15 @@
 	};
 	CRole.prototype.setFilled = function(isFilled)
 	{
-		if (this.FieldGroup)
-			this.FieldGroup.setFilled(isFilled);
+		if (!this.FieldGroup || isFilled === this.FieldGroup.isFilled())
+			return;
+		
+		this.FieldGroup.setFilled(isFilled);
+		
+		if (isFilled)
+			this.FieldGroup.setDate(Date.now());
+		else
+			this.FieldGroup.setDate(undefined);
 	};
 	CRole.prototype.getFieldGroup = function()
 	{
diff --git a/oform/format/FieldGroup.js b/oform/format/FieldGroup.js
index 9c6bb6d..3595a34 100644
--- a/oform/format/FieldGroup.js
+++ b/oform/format/FieldGroup.js
@@ -43,6 +43,7 @@
 		AscOForm.CBaseFormatObject.call(this);
 
 		this.Filled = false;
+		this.Date   = undefined;
 		this.Weight = null;
 		this.Fields = [];
 		this.Users  = [];
@@ -84,6 +85,18 @@
 	{
 		return this.Weight;
 	};
+	CFieldGroup.prototype.setDate = function(date)
+	{
+		if (date === this.Date)
+			return;
+		
+		AscCommon.History.Add(new AscDFH.CChangesOFormFieldGroupDate(this, this.Date, date));
+		this.Date = date;
+	};
+	CFieldGroup.prototype.getDate = function()
+	{
+		return this.Date;
+	};
 	CFieldGroup.prototype.addField = function(field)
 	{
 		if (!field || -1 !== this.Fields.indexOf(field))
@@ -230,6 +243,13 @@
 		writer.WriteXmlNullableAttributeInt("weight", this.getWeight());
 		if (this.isFilled())
 			writer.WriteXmlNullableAttributeBool("filled", true);
+		
+		if (this.Date)
+		{
+			let dateUtc = new Date(this.Date).toISOString().slice(0, 19) + 'Z';
+			writer.WriteXmlNullableAttributeString("date", dateUtc);
+		}
+		
 		writer.WriteXmlAttributesEnd();
 		
 		for (let userIndex = 0, userCount = this.Users.length; userIndex < userCount; ++userIndex)
@@ -265,8 +285,14 @@
 			let attrName = reader.GetNameNoNS();
 			if ("weight" === attrName)
 				fG.setWeight(reader.GetValueInt());
-			if ("filled" === attrName)
+			else if ("filled" === attrName)
 				fG.setFilled(reader.GetValueBool());
+			else if ("date" === attrName)
+			{
+				let date = AscCommon.getTimeISO8601(reader.GetValueDecodeXml());
+				if (!isNaN(date))
+					fG.setDate(date);
+			}
 		}
 		
 		let xmlReaderContext = reader.GetOformContext();
diff --git a/oform/format/changes/FieldGroupChanges.js b/oform/format/changes/FieldGroupChanges.js
index 13d8b52..de330a0 100644
--- a/oform/format/changes/FieldGroupChanges.js
+++ b/oform/format/changes/FieldGroupChanges.js
@@ -38,6 +38,7 @@
 	window['AscDFH'].historyitem_OForm_FieldGroup_AddRemoveField = window['AscDFH'].historyitem_type_OForm_FieldGroup | 2;
 	window['AscDFH'].historyitem_OForm_FieldGroup_AddRemoveUser  = window['AscDFH'].historyitem_type_OForm_FieldGroup | 3;
 	window['AscDFH'].historyitem_OForm_FieldGroup_Filled         = window['AscDFH'].historyitem_type_OForm_FieldGroup | 4;
+	window['AscDFH'].historyitem_OForm_FieldGroup_Date           = window['AscDFH'].historyitem_type_OForm_FieldGroup | 5;
 
 	/**
 	 * @constructor
@@ -143,4 +144,25 @@
 	);
 	window['AscDFH'].CChangesOFormFieldGroupFilled = CChangesOFormFieldGroupFilled;
 	
+	/**
+	 * @constructor
+	 * @extends {window['AscDFH'].CChangesBaseStringProperty}
+	 */
+	function CChangesOFormFieldGroupDate(Class, Old, New)
+	{
+		window['AscDFH'].CChangesBaseStringProperty.call(this, Class, Old, New);
+	}
+	window['AscDFH'].InheritPropertyChange(
+		CChangesOFormFieldGroupDate,
+		window['AscDFH'].CChangesBaseStringProperty,
+		window['AscDFH'].historyitem_OForm_FieldGroup_Date,
+		function(value)
+		{
+			let v = parseInt(value);
+			this.Class.Date = isNaN(v) ? undefined : v;
+		},
+		false
+	);
+	window['AscDFH'].CChangesOFormFieldGroupDate = CChangesOFormFieldGroupDate;
+	
 })(window);