You can use Task Scheduler to schedule and run services or scripts at specific times or after certain events.
From the knowledge base:
- Go to Main Menu > Control Panel > Task Scheduler.
- Create a task under Scheduled Task.
- Supported tasks include:
- User-defined script: run your own scripts or commands
- Recycle Bin
- Beep Control
- Service
- In the Create task window:
- Set General settings
- Set Schedule settings:
- Date: daily, weekly, monthly, or a specific date
- Time: how many times per day the task runs, plus first and last run time
- Configure Task Settings if available
- Click OK to save.
For scheduling options, the older DSM 4.0/4.1 guide also mentions shared-folder sync schedules with:
- Run sync every [number] hours or minutes
- Run sync automatically every day at (hh:mm)
- Run sync manually
- Run sync on modification
If you meant true Linux cron jobs, the provided fragments only say that cron is a system scheduler and that managing entries is done with crontab, but they do not give Synology-specific steps for running cron jobs through Task Scheduler.
Sources used: [5], [9], [10], [11], [12], [13], [8], [1], [2]