title: How to get all the current year holidays from google calendar API using Node.js?
body: <p>Following code get events from calendar API but i want to get current year Holidays please help me..</p>
  
  <pre><code>var fs = require('fs');
  var readline = require('readline');
  var google = require('googleapis');
  var googleAuth = require('google-auth-library');
  
  var SCOPES = ['https://www.googleapis.com/auth/calendar.readonly'];
  var TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
     process.env.USERPROFILE) + '/.credentials/';
  var TOKEN_PATH = TOKEN_DIR + 'calendar-api-quickstart.json';
  
  // Load client secrets from a local file.
  fs.readFile('client_secret.json', function processClientSecrets(err, content) {
     if (err) {
        console.log('Error loading client secret file: ' + err);
        return;
     }
     // Authorize a client with the loaded credentials, then call the
     // Google Calendar API.
     console.log("content " + content);
     authorize(JSON.parse(content), listEvents);
  });
  
  /**
   * Create an OAuth2 client with the given credentials, and then execute the
   * given callback function.
   *
   * @param {Object} credentials The authorization client credentials.
   * @param {function} callback The callback to call with the authorized client.
   */
  function authorize(credentials, callback) {
     var clientSecret = credentials.installed.client_secret;
     var clientId = credentials.installed.client_id;
     var redirectUrl = credentials.installed.redirect_uris[0];
     var auth = new googleAuth();
     var oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl);
  
     // Check if we have previously stored a token.
     fs.readFile(TOKEN_PATH, function (err, token) {
        if (err) {
           getNewToken(oauth2Client, callback);
        } else {
           oauth2Client.credentials = JSON.parse(token);
           callback(oauth2Client);
        }
     });
  }
  
  /**
   * Get and store new token after prompting for user authorization, and then
   * execute the given callback with the authorized OAuth2 client.
   *
   * @param {google.auth.OAuth2} oauth2Client The OAuth2 client to get token for.
   * @param {getEventsCallback} callback The callback to call with the authorized
   *     client.
   */
  function getNewToken(oauth2Client, callback) {
     var authUrl = oauth2Client.generateAuthUrl({
        access_type: 'offline',
        scope: SCOPES
     });
     console.log('Authorize this app by visiting this url: ', authUrl);
     var rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
     });
     rl.question('Enter the code from that page here: ', function (code) {
        rl.close();
        oauth2Client.getToken(code, function (err, token) {
           if (err) {
              console.log('Error while trying to retrieve access token', err);
              return;
           }
           oauth2Client.credentials = token;
           storeToken(token);
           callback(oauth2Client);
        });
     });
  }
  
  /**
   * Store token to disk be used in later program executions.
   *
   * @param {Object} token The token to store to disk.
   */
  function storeToken(token) {
     try {
        fs.mkdirSync(TOKEN_DIR);
     } catch (err) {
        if (err.code != 'EEXIST') {
           throw err;
        }
     }
     fs.writeFile(TOKEN_PATH, JSON.stringify(token));
     console.log('Token stored to ' + TOKEN_PATH);
  }
  
  /**
   * Lists the next 10 events on the user's primary calendar.
   *
   * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
   */
  function listEvents(auth) {
     var calendar = google.calendar('v3');
     calendar.events.list({
        auth: auth,
        calendarId: 'primary',
        timeMin: (new Date()).toISOString(),
        maxResults: 10,
        singleEvents: true,
        orderBy: 'startTime'
     }, function (err, response) {
        if (err) {
           console.log('The API returned an error: ' + err);
           return;
        }
        var events = response.items;
        if (events.length == 0) {
           console.log('No upcoming events found.');
        } else {
           console.log('Upcoming 10 events:');
           for (var i = 0; i &lt; events.length; i++) {
              var event = events[i];
              var start = event.start.dateTime || event.start.date;
              console.log('%s - %s', start, event.summary);
           }
        }
     });
  }
  </code></pre>
  
  <p>I want to get whole the current year holiday from Google calendar API.please give me solution if any one knows.</p>