diff --git a/src/common/datetime/format_date.ts b/src/common/datetime/format_date.ts
index d8c46d4e8d79..a4441bf379a5 100644
--- a/src/common/datetime/format_date.ts
+++ b/src/common/datetime/format_date.ts
@@ -9,3 +9,12 @@ export const formatDate = toLocaleDateStringSupportsOptions
         day: "numeric",
       })
   : (dateObj: Date) => format(dateObj, "longDate");
+
+export const formatDateWeekday = toLocaleDateStringSupportsOptions
+  ? (dateObj: Date, locales: string) =>
+      dateObj.toLocaleDateString(locales, {
+        weekday: "long",
+        month: "short",
+        day: "numeric",
+      })
+  : (dateObj: Date) => format(dateObj, "dddd, D MMM");
diff --git a/src/common/datetime/format_time.ts b/src/common/datetime/format_time.ts
index c27874f3a62d..6b79f0c173e4 100644
--- a/src/common/datetime/format_time.ts
+++ b/src/common/datetime/format_time.ts
@@ -17,3 +17,12 @@ export const formatTimeWithSeconds = toLocaleTimeStringSupportsOptions
         second: "2-digit",
       })
   : (dateObj: Date) => format(dateObj, "mediumTime");
+
+export const formatTimeWeekday = toLocaleTimeStringSupportsOptions
+  ? (dateObj: Date, locales: string) =>
+      dateObj.toLocaleTimeString(locales, {
+        weekday: "long",
+        hour: "numeric",
+        minute: "2-digit",
+      })
+  : (dateObj: Date) => format(dateObj, "dddd, HH:mm");
diff --git a/src/components/ha-markdown-element.ts b/src/components/ha-markdown-element.ts
index cd07cf0a012e..503e77a39aa4 100644
--- a/src/components/ha-markdown-element.ts
+++ b/src/components/ha-markdown-element.ts
@@ -1,9 +1,13 @@
 import { customElement, property, UpdatingElement } from "lit-element";
 import { fireEvent } from "../common/dom/fire_event";
 import { renderMarkdown } from "../resources/render-markdown";
+import type { HomeAssistant } from "../types";
+import { HuiTimestampDisplay } from "../panels/lovelace/components/hui-timestamp-display";
 
 @customElement("ha-markdown-element")
 class HaMarkdownElement extends UpdatingElement {
+  @property({ attribute: false }) public hass?: HomeAssistant;
+
   @property() public content?;
 
   @property({ type: Boolean }) public allowSvg = false;
@@ -55,6 +59,8 @@ class HaMarkdownElement extends UpdatingElement {
         // Fire a resize event when images loaded to notify content resized
       } else if (node instanceof HTMLImageElement) {
         node.addEventListener("load", this._resize);
+      } else if (node instanceof HuiTimestampDisplay) {
+        node.hass = this.hass;
       }
     }
   }
diff --git a/src/components/ha-markdown.ts b/src/components/ha-markdown.ts
index c98f5d07a966..beb38d268e21 100644
--- a/src/components/ha-markdown.ts
+++ b/src/components/ha-markdown.ts
@@ -7,10 +7,13 @@ import {
   property,
   TemplateResult,
 } from "lit-element";
+import type { HomeAssistant } from "../types";
 import "./ha-markdown-element";
 
 @customElement("ha-markdown")
 class HaMarkdown extends LitElement {
+  @property({ attribute: false }) public hass?: HomeAssistant;
+
   @property() public content?;
 
   @property({ type: Boolean }) public allowSvg = false;
@@ -22,11 +25,13 @@ class HaMarkdown extends LitElement {
       return html``;
     }
 
-    return html`<ha-markdown-element
+    return html` <ha-markdown-element
+      .hass=${this.hass}
       .content=${this.content}
       .allowSvg=${this.allowSvg}
       .breaks=${this.breaks}
-    ></ha-markdown-element>`;
+    >
+    </ha-markdown-element>`;
   }
 
   static get styles(): CSSResult {
diff --git a/src/panels/lovelace/cards/hui-markdown-card.ts b/src/panels/lovelace/cards/hui-markdown-card.ts
index 8aaedc76a978..2b049ce4f2f7 100644
--- a/src/panels/lovelace/cards/hui-markdown-card.ts
+++ b/src/panels/lovelace/cards/hui-markdown-card.ts
@@ -82,6 +82,7 @@ export class HuiMarkdownCard extends LitElement implements LovelaceCard {
     return html`
       <ha-card .header="${this._config.title}">
         <ha-markdown
+          .hass=${this.hass}
           breaks
           class=${classMap({
             "no-header": !this._config.title,
diff --git a/src/panels/lovelace/components/hui-timestamp-display.ts b/src/panels/lovelace/components/hui-timestamp-display.ts
index 08bcfe8770d0..c4b0b62ed6d0 100644
--- a/src/panels/lovelace/components/hui-timestamp-display.ts
+++ b/src/panels/lovelace/components/hui-timestamp-display.ts
@@ -7,25 +7,34 @@ import {
   PropertyValues,
   TemplateResult,
 } from "lit-element";
-import { formatDate } from "../../../common/datetime/format_date";
+import checkValidDate from "../../../common/datetime/check_valid_date";
+import {
+  formatDate,
+  formatDateWeekday,
+} from "../../../common/datetime/format_date";
 import { formatDateTime } from "../../../common/datetime/format_date_time";
-import { formatTime } from "../../../common/datetime/format_time";
+import {
+  formatTime,
+  formatTimeWeekday,
+} from "../../../common/datetime/format_time";
 import relativeTime from "../../../common/datetime/relative_time";
 import { HomeAssistant } from "../../../types";
 import { TimestampRenderingFormats } from "./types";
 
 const FORMATS: { [key: string]: (ts: Date, lang: string) => string } = {
   date: formatDate,
+  date_weekday: formatDateWeekday,
   datetime: formatDateTime,
   time: formatTime,
+  time_weekday: formatTimeWeekday,
 };
 const INTERVAL_FORMAT = ["relative", "total"];
 
 @customElement("hui-timestamp-display")
-class HuiTimestampDisplay extends LitElement {
+export class HuiTimestampDisplay extends LitElement {
   @property({ attribute: false }) public hass?: HomeAssistant;
 
-  @property() public ts?: Date;
+  @property() public ts?: string | Date;
 
   @property() public format?: TimestampRenderingFormats;
 
@@ -52,7 +61,9 @@ class HuiTimestampDisplay extends LitElement {
       return html``;
     }
 
-    if (isNaN(this.ts.getTime())) {
+    const tsDate = this.ts instanceof Date ? this.ts : new Date(this.ts);
+
+    if (!checkValidDate(tsDate)) {
       return html`${this.hass.localize(
         "ui.panel.lovelace.components.timestamp-display.invalid"
       )}`;
@@ -64,7 +75,7 @@ class HuiTimestampDisplay extends LitElement {
       return html` ${this._relative} `;
     }
     if (format in FORMATS) {
-      return html` ${FORMATS[format](this.ts, this.hass.language)} `;
+      return html`${FORMATS[format](tsDate, this.hass.language)}`;
     }
     return html`${this.hass.localize(
       "ui.panel.lovelace.components.timestamp-display.invalid_format"
@@ -105,11 +116,12 @@ class HuiTimestampDisplay extends LitElement {
 
   private _updateRelative(): void {
     if (this.ts && this.hass!.localize) {
+      const tsDate = this.ts instanceof Date ? this.ts : new Date(this.ts);
       this._relative =
         this._format === "relative"
-          ? relativeTime(this.ts, this.hass!.localize)
+          ? relativeTime(tsDate, this.hass!.localize)
           : (this._relative = relativeTime(new Date(), this.hass!.localize, {
-              compareTime: this.ts,
+              compareTime: tsDate,
               includeTense: false,
             }));
     }
diff --git a/src/panels/lovelace/components/types.ts b/src/panels/lovelace/components/types.ts
index 4e49ee3e4410..45907406066d 100644
--- a/src/panels/lovelace/components/types.ts
+++ b/src/panels/lovelace/components/types.ts
@@ -11,5 +11,7 @@ export type TimestampRenderingFormats =
   | "relative"
   | "total"
   | "date"
+  | "date_weekday"
   | "time"
+  | "time_weekday"
   | "datetime";
diff --git a/src/resources/markdown_worker.ts b/src/resources/markdown_worker.ts
index 5545a87f358f..a41ba7d3a524 100644
--- a/src/resources/markdown_worker.ts
+++ b/src/resources/markdown_worker.ts
@@ -22,8 +22,10 @@ const renderMarkdown = (
   if (!whiteListNormal) {
     whiteListNormal = {
       ...(getDefaultWhiteList() as WhiteList),
+      style: [],
       "ha-icon": ["icon"],
       "ha-svg-icon": ["path"],
+      "hui-timestamp-display": ["ts", "format"],
     };
   }