diff --git a/src/controllers/event.controller.js b/src/controllers/event.controller.js
index 8404206..7bb4701 100644
--- a/src/controllers/event.controller.js
+++ b/src/controllers/event.controller.js
@@ -1,4 +1,5 @@
 import * as eventService from '../services/event.service.js';
+import { triggerSingleEventNotification } from '../cron/index.js';
 
 /**
  * Get calendar data (events + todos) by month
@@ -106,3 +107,24 @@ export const deleteEvent = async (req, res, next) => {
     next(error);
   }
 };
+
+/**
+ * Send notification for an event to all assigned users (admin only)
+ * POST /api/events/:eventId/notify
+ */
+export const sendEventNotification = async (req, res, next) => {
+  try {
+    const { eventId } = req.params;
+    const adminUserId = req.userId;
+
+    const stats = await triggerSingleEventNotification(eventId, adminUserId);
+
+    res.status(200).json({
+      success: true,
+      data: stats,
+      message: `Notifikácie pre "${stats.eventTitle}" odoslané: ${stats.sent}, neúspešné: ${stats.failed}, preskočené: ${stats.skipped}`,
+    });
+  } catch (error) {
+    next(error);
+  }
+};
diff --git a/src/cron/calendar/event-notifier.js b/src/cron/calendar/event-notifier.js
index 5aea55b..171506f 100644
--- a/src/cron/calendar/event-notifier.js
+++ b/src/cron/calendar/event-notifier.js
@@ -222,6 +222,145 @@ const sendNotificationEmail = async (jmapConfig, to, subject, htmlBody, textBody
   }
 };
 
+/**
+ * Get sender account by user ID (admin's primary email)
+ * @param {string} userId - Admin user ID
+ * @returns {Promise<Object|null>} Sender account with decrypted password
+ */
+const getSenderAccountByUserId = async (userId) => {
+  const [result] = await db
+    .select({
+      id: emailAccounts.id,
+      email: emailAccounts.email,
+      emailPassword: emailAccounts.emailPassword,
+      jmapAccountId: emailAccounts.jmapAccountId,
+    })
+    .from(userEmailAccounts)
+    .innerJoin(emailAccounts, eq(userEmailAccounts.emailAccountId, emailAccounts.id))
+    .where(
+      and(
+        eq(userEmailAccounts.userId, userId),
+        eq(userEmailAccounts.isPrimary, true)
+      )
+    )
+    .limit(1);
+
+  if (!result) {
+    logger.error(`Používateľ ${userId} nemá nastavený primárny email účet`);
+    return null;
+  }
+
+  try {
+    const decryptedPassword = decryptPassword(result.emailPassword);
+    return {
+      id: result.id,
+      email: result.email,
+      password: decryptedPassword,
+      jmapAccountId: result.jmapAccountId,
+    };
+  } catch (error) {
+    logger.error(`Nepodarilo sa dešifrovať heslo pre ${result.email}`, error);
+    return null;
+  }
+};
+
+/**
+ * Send notification for a single event to all assigned users
+ * @param {string} eventId - Event ID
+ * @param {string} adminUserId - Admin user ID (sender)
+ * @returns {Promise<{ sent: number, failed: number, skipped: number, eventTitle: string }>}
+ */
+export const sendSingleEventNotification = async (eventId, adminUserId) => {
+  logger.info(`=== Odosielam notifikácie pre event ${eventId} od admina ${adminUserId} ===`);
+
+  const stats = { sent: 0, failed: 0, skipped: 0, eventTitle: '' };
+
+  // Get admin's primary email account
+  const senderAccount = await getSenderAccountByUserId(adminUserId);
+  if (!senderAccount) {
+    throw new Error('Nemáte nastavený primárny email účet. Nastavte ho v profile.');
+  }
+
+  const jmapConfig = {
+    server: process.env.JMAP_SERVER,
+    username: senderAccount.email,
+    password: senderAccount.password,
+    accountId: senderAccount.jmapAccountId,
+  };
+
+  logger.info(`Odosielam z účtu: ${senderAccount.email}`);
+
+  // Get the event with assigned users
+  const eventData = await db
+    .select({
+      eventId: events.id,
+      title: events.title,
+      description: events.description,
+      type: events.type,
+      start: events.start,
+      end: events.end,
+      userId: users.id,
+      username: users.username,
+      firstName: users.firstName,
+      lastName: users.lastName,
+    })
+    .from(events)
+    .innerJoin(eventUsers, eq(events.id, eventUsers.eventId))
+    .innerJoin(users, eq(eventUsers.userId, users.id))
+    .where(eq(events.id, eventId));
+
+  if (eventData.length === 0) {
+    throw new Error('Event nebol nájdený alebo nemá priradených používateľov');
+  }
+
+  stats.eventTitle = eventData[0].title;
+  logger.info(`Event: ${stats.eventTitle}, priradených používateľov: ${eventData.length}`);
+
+  // Send notifications to each assigned user
+  for (const row of eventData) {
+    const { userId, username, firstName } = row;
+    const event = {
+      id: row.eventId,
+      title: row.title,
+      description: row.description,
+      type: row.type,
+      start: row.start,
+      end: row.end,
+    };
+
+    // Get user's email
+    const userEmail = await getUserEmail(userId);
+
+    if (!userEmail) {
+      logger.warn(`Používateľ ${username} nemá nastavený primárny email - preskakujem`);
+      stats.skipped++;
+      continue;
+    }
+
+    // Generate email content
+    const subject = generateEventNotificationSubject(event);
+    const htmlBody = generateEventNotificationHtml({ firstName, username, event });
+    const textBody = generateEventNotificationText({ firstName, username, event });
+
+    // Send email
+    logger.info(`Odosielam notifikáciu pre ${username} (${userEmail})`);
+
+    const success = await sendNotificationEmail(jmapConfig, userEmail, subject, htmlBody, textBody);
+
+    if (success) {
+      logger.success(`Email úspešne odoslaný na ${userEmail}`);
+      stats.sent++;
+    } else {
+      logger.error(`Nepodarilo sa odoslať email na ${userEmail}`);
+      stats.failed++;
+    }
+  }
+
+  logger.info(`=== Hotovo: odoslaných ${stats.sent}, neúspešných ${stats.failed}, preskočených ${stats.skipped} ===`);
+
+  return stats;
+};
+
 /**
  * Main function to send event notifications
  * @returns {Promise<{ sent: number, failed: number, skipped: number }>}
diff --git a/src/cron/calendar/index.js b/src/cron/calendar/index.js
index c539a64..197bfa9 100644
--- a/src/cron/calendar/index.js
+++ b/src/cron/calendar/index.js
@@ -1,6 +1,6 @@
 import cron from 'node-cron';
 import { logger } from '../../utils/logger.js';
-import { sendEventNotifications } from './event-notifier.js';
+import { sendEventNotifications, sendSingleEventNotification } from './event-notifier.js';
 
 /**
  * Parse NOTIFICATION_TIME from env (format: "HH:mm")
@@ -71,3 +71,13 @@ export const triggerEventNotifications = async () => {
   logger.info('Manuálne spúšťam kontrolu notifikácií...');
   return sendEventNotifications();
 };
+
+/**
+ * Send notification for a single event
+ * @param {string} eventId - Event ID
+ * @param {string} adminUserId - Admin user ID (sender)
+ */
+export const triggerSingleEventNotification = async (eventId, adminUserId) => {
+  logger.info(`Manuálne spúšťam notifikáciu pre event ${eventId} od admina ${adminUserId}...`);
+  return sendSingleEventNotification(eventId, adminUserId);
+};
diff --git a/src/cron/index.js b/src/cron/index.js
index ff4585e..7b9a0cf 100644
--- a/src/cron/index.js
+++ b/src/cron/index.js
@@ -1,5 +1,5 @@
 import { logger } from '../utils/logger.js';
-import { startCalendarNotificationCron, triggerEventNotifications } from './calendar/index.js';
+import { startCalendarNotificationCron, triggerEventNotifications, triggerSingleEventNotification } from './calendar/index.js';
 
 /**
  * Start all cron jobs
@@ -14,4 +14,4 @@ export const startAllCronJobs = () => {
 };
 
 // Export individual functions for testing/manual triggers
-export { triggerEventNotifications };
+export { triggerEventNotifications, triggerSingleEventNotification };
diff --git a/src/routes/event.routes.js b/src/routes/event.routes.js
index de5e8a9..f9805a7 100644
--- a/src/routes/event.routes.js
+++ b/src/routes/event.routes.js
@@ -69,4 +69,14 @@ router.delete(
   eventController.deleteEvent
 );
 
+/**
+ * POST /api/events/:eventId/notify - Odoslať notifikácie priradeným používateľom (iba admin)
+ */
+router.post(
+  '/:eventId/notify',
+  requireAdmin,
+  validateParams(eventIdSchema),
+  eventController.sendEventNotification
+);
+
 export default router;