Every 30 Minutes
Runs twice per hour
Expression
*/30 * * * *
Field breakdown
- Minute
*/30— Every 30 minute(s)- Hour
*— Every hour (0–23)- Day of month
*— Every day (1–31)- Month
*— Every month (1–12)- Day of week
*— Every day of week (0–6, 0=Sun)
Next run times
00 and 30 past each hour