Cron Every Hour at Minute 30 (Half-Hour Mark)
Cron expression to run a job at the 30-minute mark of every hour: 30 * * * *. Runs at :30 past each hour — staggered from the top-of-hour rush.
30
Minute
*
Hour
*
Day (M)
*
Month
*
Weekday
“At 30 minutes past the hour”
Next execution dates
- Thu, Jun 11, 2026, 12:30:00 PMin 45 minutes
- Thu, Jun 11, 2026, 01:30:00 PMin 2 hours
- Thu, Jun 11, 2026, 02:30:00 PMin 3 hours
- Thu, Jun 11, 2026, 03:30:00 PMin 4 hours
- Thu, Jun 11, 2026, 04:30:00 PMin 5 hours
Visual builder
Pick how often the job should run. The expression updates automatically.
At:
How cron syntax works
A standard cron expression has five fields, separated by spaces.
| Minute | Hour | Day of month | Month | Day of week |
|---|---|---|---|---|
| 0 - 59 | 0 - 23 | 1 - 31 | 1 - 12 | 0 - 6 (Sun-Sat) |
*Any value* * * * * — every minute
,Value list separator0 9,17 * * * — at 9 AM and 5 PM
-Range of values0 9-17 * * * — every hour 9 AM–5 PM
/Step values*/15 * * * * — every 15 minutes
?No specific value (Quartz)0 0 12 ? * MON
LLast (day of month/week)0 0 L * ? — last day of month
Common cron expressions
Click any example to load and translate it.
When to use this schedule
Running at :30 instead of :00 avoids the congestion spike that happens when dozens of `0 * * * *` jobs fire simultaneously on shared infrastructure. A simple way to stagger competing jobs without changing their frequency.