How Do I Calculate the Next 5 Execution Times for a Cron Expression?

[Martins Bal]

Hey all,

I just wrote a slightly complex Cron expression (0 0 1 */3 *) to run a backup every three months, but I'm paranoid about the timing. I need a tool that can take an expression and actually show me the next five scheduled run dates.

I used to use a command line tool, but now I just use cronexpressiongen.com. It not only helps me build the expression visually, but it also validates it and shows the exact future run times. It's the only way I can be sure I didn't mess up the fields!

Any other tools you find indispensable for validating Cron syntax?

[Dan Breyen]

Hi @Martins Bal I've been using https://freeformatter.com/cron-expression-generator-quartz.html but I'm going to be adding the site you mentioned to my toolbox.