1. Server-Side Time Calculation and Communication to Frontend

Yes, it is absolutely possible to pass time from the server to the website every 24 hours. There are a few ways you can implement this, depending on how you want to handle the updates and the technology stack you're using. I'll walk you through a general approach for this:

1. Server-Side Time Calculation and Communication to Frontend

You can set up a server-side process (on the backend) that calculates or tracks the time and sends updates to the frontend. This can be done using APIs, WebSockets, or Polling.

A) Using APIs (Simple Approach)

You can set up an API endpoint on your server that returns the server's current time or the time remaining until the next event. The frontend can periodically call this API to update the time on the page.

Example Backend (Node.js/Express):

On the backend, create an API route that sends the current time or time remaining:

javascript
// Backend: Node.js/Express Example
const express = require('express');
const app = express();
const port = 3000;

// This endpoint sends the current server time to the frontend
app.get('/api/time', (req, res) => {
  const serverTime = new Date();
  res.json({ serverTime: serverTime.toISOString() });  // Return time in ISO format
});

app.listen(port, () => {
  console.log(`Server is running at http://localhost:${port}`);
});

Example Frontend (React):

On the frontend, you can use setInterval to fetch the server time every 24 hours (or a smaller interval for quicker updates).

javascript
import { useState, useEffect } from 'react';

const TimeRemainingComponent = () => {
  const [serverTime, setServerTime] = useState(null);

  useEffect(() => {
    const fetchServerTime = async () => {
      const response = await fetch('/api/time');
      const data = await response.json();
      setServerTime(data.serverTime);
    };

    fetchServerTime(); // Initial fetch
    const intervalId = setInterval(fetchServerTime, 24 * 60 * 60 * 1000); // Fetch every 24 hours

    return () => clearInterval(intervalId); // Cleanup on unmount
  }, []);

  return (
    <div>
      {serverTime ? (
        <p>Current Server Time: {new Date(serverTime).toLocaleString()}</p>
      ) : (
        <p>Loading...</p>
      )}
    </div>
  );
};

export default TimeRemainingComponent;

B) Using WebSockets for Real-Time Updates

If you want to push updates to the frontend in real time without the need for periodic polling, you can use WebSockets to send updates from the server to the client every 24 hours or whenever necessary.

Backend (Node.js + WebSocket Server using `ws` library):

You can set up a WebSocket server on the backend that sends the time to connected clients every 24 hours.

javascript
// Backend: WebSocket server (Node.js)
const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });

wss.on('connection', ws => {
  console.log('A client connected');

  // Send the server time every 24 hours
  setInterval(() => {
    const serverTime = new Date();
    ws.send(JSON.stringify({ serverTime: serverTime.toISOString() }));
  }, 24 * 60 * 60 * 1000); // 24 hours in milliseconds
});

Frontend (React + WebSocket Client):

On the frontend, you can use the WebSocket API to listen for time updates.

javascript
import { useState, useEffect } from 'react';

const TimeRemainingComponent = () => {
  const [serverTime, setServerTime] = useState(null);

  useEffect(() => {
    const socket = new WebSocket('ws://localhost:8080');

    socket.onopen = () => {
      console.log('Connected to WebSocket server');
    };

    socket.onmessage = (event) => {
      const data = JSON.parse(event.data);
      setServerTime(data.serverTime);
    };

    return () => socket.close();  // Cleanup when component unmounts
  }, []);

  return (
    <div>
      {serverTime ? (
        <p>Current Server Time: {new Date(serverTime).toLocaleString()}</p>
      ) : (
        <p>Loading...</p>
      )}
    </div>
  );
};

export default TimeRemainingComponent;

C) Using Server-Sent Events (SSE) for Real-Time One-Way Communication

Alternatively, if you don't need bidirectional communication like WebSockets but want to push updates to the frontend at regular intervals, you can use Server-Sent Events (SSE).

Backend (Node.js):

javascript
// Backend: Server-Sent Events
app.get('/events', (req, res) => {
  res.setHeader('Content-Type', 'text/event-stream');
  res.setHeader('Cache-Control', 'no-cache');
  res.setHeader('Connection', 'keep-alive');
  
  setInterval(() => {
    const serverTime = new Date();
    res.write(`data: ${JSON.stringify({ serverTime: serverTime.toISOString() })}\n\n`);
  }, 24 * 60 * 60 * 1000);  // Send every 24 hours
});

Frontend (React):

javascript
import { useState, useEffect } from 'react';

const TimeRemainingComponent = () => {
  const [serverTime, setServerTime] = useState(null);

  useEffect(() => {
    const eventSource = new EventSource('/events');

    eventSource.onmessage = (event) => {
      const data = JSON.parse(event.data);
      setServerTime(data.serverTime);
    };

    return () => eventSource.close(); // Cleanup when component unmounts
  }, []);

  return (
    <div>
      {serverTime ? (
        <p>Current Server Time: {new Date(serverTime).toLocaleString()}</p>
      ) : (
        <p>Loading...</p>
      )}
    </div>
  );
};

export default TimeRemainingComponent;

2. How This Works

Backend: In all of these approaches, the backend calculates or provides the time that should be sent to the frontend. The server can send updates once a day, or more frequently if needed.
Frontend: The frontend listens for updates either by making periodic API requests, using WebSockets, or listening for server-sent events. When the frontend receives the new time, it can update the UI accordingly.

3. Which One to Choose?

API: Good if you want to make updates on demand or at a specific time, and you don't need to keep a constant connection open.
WebSocket: Ideal for real-time, bidirectional communication, such as for dashboards or other systems where the frontend and backend need to communicate frequently.
SSE: Great for one-way communication where the server pushes updates to the client but the client doesn't need to send data back to the server frequently.

Conclusion:

If you want to send the time to the frontend every 24 hours, API polling is the simplest way to implement it, but if you need real-time updates or instant notifications when the time changes, WebSockets or Server-Sent Events (SSE) are better options. You can choose based on your needs and infrastructure.

1. Server-Side Time Calculation and Communication to Frontend