First day of the month
0 0 1 * *
At 00:00, on day 1 of the month. Midnight on the 1st. Billing and report jobs often use this.
Check the next five runs
Output
The result shows up here. Your input is not written to the log.
Questions
›What does 0 0 1 * * mean?
At 00:00, on day 1 of the month
›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.