Implementing scheduler to keep syncing database

[Zalasanjay]

Hello friends, I've implement scheduler for sync database as per users requirement like user can set as "at 5:00 pm on Weds,Thurs and Fri" or something else like that.

I've configure my later.js code when the user create connection for any database and that time only my scheduler will execute. if user create database connection and my keep_sync scheduler starts. after that if my server restart then what will happen my keep_sync scheduler will also restart or i have to manually need to execute it again?

var http = require('http');
var express = require('express');
var later = require('later');
var app = express();
var port = Number(2200);

later.date.UTC();
later.date.localTime();

var server = http.createServer(app).listen(port, function () {
    console.log('App Runnings on: ', port);
})

var keep_sync = later.parse.text("at 5:00 pm on Weds,Thurs and Fri");
later.setInterval(syncDb, keep_sync);

function syncDb() {
    // my database sync code appends here
} 

Any suggestions how it can be accomplished with later.js?