Every 3 hours
0 */3 * * *
On the hour, every 3 hours. Eight times a day, starting at midnight.
Check the next five runs
Output
The result shows up here. Your input is not written to the log.
Questions
›What does 0 */3 * * * mean?
On the hour, every 3 hours
›Which timezone are the next runs in?
The expression is evaluated in UTC. This page also shows those times in the timezone of the browser you are using.