diff --git a/packages/main/cypress/specs/DateRangePicker.cy.tsx b/packages/main/cypress/specs/DateRangePicker.cy.tsx
index 4dbd613c0a64..59985f6b73aa 100644
--- a/packages/main/cypress/specs/DateRangePicker.cy.tsx
+++ b/packages/main/cypress/specs/DateRangePicker.cy.tsx
@@ -970,6 +970,14 @@ describe("Validation inside a form", () => {
 	});
 });
 
+describe("DateRangePicker rejects relative dates", () => {
+	const relativeKeywords = ["today", "tomorrow", "yesterday"];
+
+	relativeKeywords.forEach(keyword => {
+		it(`typing '${keyword}' sets error state`, () => {
+			cy.mount(<DateRangePicker></DateRangePicker>);
+
+			cy.get("[ui5-daterange-picker]")
 describe("DateRangePicker - Two Calendars Feature", () => {
 	describe("Basic Two Calendars Display", () => {
 		it("should display two calendars when showTwoMonths is true", () => {
@@ -1003,6 +1011,32 @@ describe("DateRangePicker - Two Calendars Feature", () => {
 				.realClick()
 				.should("be.focused");
 
+			cy.realType(keyword);
+			cy.realPress("Enter");
+
+			cy.get("@dateRangePicker")
+				.should("have.value", keyword)
+				.should("have.attr", "value-state", "Negative");
+		});
+	});
+
+	it("valid concrete date range does not set error state", () => {
+		cy.mount(<DateRangePicker displayFormat="dd/MM/yyyy"></DateRangePicker>);
+
+		cy.get("[ui5-daterange-picker]")
+			.as("dateRangePicker")
+			.shadow()
+			.find("[ui5-datetime-input]")
+			.realClick()
+			.should("be.focused");
+
+		cy.realType("09/09/2020 - 10/10/2020");
+		cy.realPress("Enter");
+
+		cy.get("@dateRangePicker")
+			.should("have.attr", "value-state", "None");
+	});
+});
 			cy.realPress("F4");
 
 			cy.get<DateRangePicker>("@dateRangePicker")
diff --git a/packages/main/src/DateRangePicker.ts b/packages/main/src/DateRangePicker.ts
index 397a032e2c05..6e7d2fa97b75 100644
--- a/packages/main/src/DateRangePicker.ts
+++ b/packages/main/src/DateRangePicker.ts
@@ -6,6 +6,7 @@ import CalendarDate from "@ui5/webcomponents-localization/dist/dates/CalendarDat
 import UI5Date from "@ui5/webcomponents-localization/dist/dates/UI5Date.js";
 import modifyDateBy from "@ui5/webcomponents-localization/dist/dates/modifyDateBy.js";
 import getTodayUTCTimestamp from "@ui5/webcomponents-localization/dist/dates/getTodayUTCTimestamp.js";
+import type DateFormat from "@ui5/webcomponents-localization/dist/DateFormat.js";
 import {
 	DATERANGE_DESCRIPTION,
 	DATERANGEPICKER_POPOVER_ACCESSIBLE_NAME,
@@ -42,7 +43,10 @@ const DEFAULT_DELIMITER = "-";
  * ### Usage
  * The user can enter a date by:
  * Using the calendar that opens in a popup or typing it in directly in the input field (not available for mobile devices).
- * For the `ui5-daterange-picker`
+ * For the `ui5-daterange-picker`:
+ *
+ * **Note:** Relative date values such as "today", "yesterday", or "tomorrow" are not supported.
+ * Entering a relative date sets the component to an error state.
  * ### ES6 Module Import
  *
  * `import "@ui5/webcomponents/dist/DateRangePicker.js";`
@@ -155,6 +159,27 @@ class DateRangePicker extends DatePicker implements IFormInputElement {
 		this._prevDelimiter = null;
 	}
 
+	/**
+	 * Checks if a date string is a relative date (e.g. "today", "tomorrow")
+	 * that would be resolved by DateFormat.parseRelative().
+	 * Relative dates are not supported in DateRangePicker.
+	 * @private
+	 */
+	_isRelativeValue(dateString: string, format: DateFormat): boolean {
+		const trimmed = dateString.trim();
+		if (!trimmed) {
+			return false;
+		}
+
+		const parsed = format.parse(trimmed);
+		if (!parsed) {
+			return false;
+		}
+
+		const formatted = format.format(parsed);
+		return formatted !== trimmed;
+	}
+
 	/**
 	 * **Note:** The getter method is inherited and not supported. If called it will return an empty value.
 	 * @public
@@ -329,6 +354,10 @@ class DateRangePicker extends DatePicker implements IFormInputElement {
 	isValid(value: string): boolean {
 		const parts = this._splitValueByDelimiter(value).filter(str => str.trim() !== "");
 
+		if (parts.some(dateString => this._isRelativeValue(dateString, this.getFormat()))) {
+			return false;
+		}
+
 		return parts.length <= 2 && parts.every(dateString => super.isValid(dateString)); // must be at most 2 dates and each must be valid
 	}
 
@@ -340,6 +369,10 @@ class DateRangePicker extends DatePicker implements IFormInputElement {
 	isValidValue(value: string): boolean {
 		const parts = this._splitValueByDelimiter(value).filter(str => str.trim() !== "");
 
+		if (parts.some(dateString => this._isRelativeValue(dateString, this.getValueFormat()))) {
+			return false;
+		}
+
 		return parts.length <= 2 && parts.every(dateString => super.isValidValue(dateString)); // must be at most 2 dates and each must be valid
 	}
 
@@ -351,6 +384,10 @@ class DateRangePicker extends DatePicker implements IFormInputElement {
 	isValidDisplayValue(value: string): boolean {
 		const parts = this._splitValueByDelimiter(value).filter(str => str.trim() !== "");
 
+		if (parts.some(dateString => this._isRelativeValue(dateString, this.getDisplayFormat()))) {
+			return false;
+		}
+
 		return parts.length <= 2 && parts.every(dateString => super.isValidDisplayValue(dateString)); // must be at most 2 dates and each must be valid
 	}