index.js

const express = require('express');
const cron = require('node-cron')
const app = express();

cron.schedule('* * * January,September Sunday', () => {
  console.log('running on Sundays of January and September');
});

app.get('/', (req, res) => {
  res.json('Welcome to my API');
})

app.listen(9000, () => console.log(`Server Started at PORT: 9000`))