How to add a cron task to run every 15 minutes from 09:00 to 23:00 daily?

Question

Task Schedulers

It is necessary that the script be executed every 15 minutes daily from 09 am to 23 pm.
The Internet writes that the construction of the form: */15 09-23 * * * should work. But when adding a task through vesta cp, she writes that 09-23 cannot be written.
Where to dig?)

Answer 1

It turned out it was a bug in Vesta CP.
You need to apply these fixes and everything will work as it should:
https://github.com/serghey-rodin/vesta/pull/1452
https://github.com/serghey-rodin/vesta/pull/1453

Answer 2

9-23