Run Jobs Monthly at Noon on Day One | CronBase

# Add to /etc/cron.d/monthly-billing or user crontab
# Standard Cron syntax: Minute Hour Day-of-Month Month Day-of-Week
0 12 1 * * /usr/local/bin/generate-invoices.sh >> /var/log/cron/billing.log 2>&1

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

// Schedule task to run at 12:00 PM on the first day of every month
cron.schedule('0 12 1 * *', () => {
  try {
    console.log('Starting monthly invoice generation process...');
    // Implement production business logic here
  } catch (error) {
    console.error('Failed to execute monthly cron job:', error);
  }
}, {
  scheduled: true,
  timezone: "UTC"
});

from apscheduler.schedulers.blocking import BlockingScheduler
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

scheduler = BlockingScheduler()

@scheduler.scheduled_job('cron', day=1, hour=12, minute=0, timezone='UTC')
def monthly_backup_job():
    try:
        logger.info("Executing scheduled monthly backup...")
        # Put production backup logic here
    except Exception as e:
        logger.error(f"Monthly backup job failed: {e}", exc_info=True)

if __name__ == "__main__":
    scheduler.start()

package main

import (
	"fmt"
	"log"
	"github.com/robfig/cron/v3"
)

func main() {
	// Create a cron manager with support for standard 5-field cron specs
	c := cron.New()
	
	_, err := c.AddFunc("0 12 1 * *", func() {
		log.Println("Starting monthly data aggregation pipeline...")
		if err := runMonthlyPipeline(); err != nil {
			log.Printf("Pipeline execution failed: %v", err)
		}
	})
	if err != nil {
		log.Fatalf("Error scheduling monthly job: %v", err)
	}
	
	c.Start()
	select {} // Keep the application running
}

func runMonthlyPipeline() error {
	// Simulated heavy database operation
	return nil
}

package com.example.scheduler;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class MonthlyReportScheduler {
    private static final Logger logger = LoggerFactory.getLogger(MonthlyReportScheduler.class);

    // Spring's cron syntax: "second minute hour day-of-month month day-of-week"
    @Scheduled(cron = "0 0 12 1 * *", zone = "UTC")
    public void runMonthlyReport() {
        logger.info("Starting monthly financial report generation...");
        try {
            // Execute complex business logic
            generateLedger();
        } catch (Exception e) {
            logger.error("Error executing monthly report generation: ", e);
        }
    }

    private void generateLedger() {
        // Implementation details
    }
}

apiVersion: batch/v1
kind: CronJob
metadata:
  name: monthly-data-cleanup
  namespace: production
spec:
  schedule: "0 12 1 * *"
  concurrencyPolicy: Forbid
  successfulJobsHistoryLimit: 3
  failedJobsHistoryLimit: 5
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: cleanup-worker
            image: registry.example.com/data-cleaner:v1.2.0
            env:
            - name: ENV
              value: "production"
          restartPolicy: OnFailure