Quartz Cron expression :Run every 15 days ie twice in a month

Question

I want to set the scheduler with a quartz cron expression which will trigger every 15 days ,for example 1st and 15th of every month.The 0 15 10 15 * ? is triggering only on

Answer 1

The following also works fine, it executes your command on the 15th and the 30th at 02:00 AM of every month:

0 2 */15 * *