This is an old revision of the document!
I hate cron syntax - block from when I was younger
Every day at 2:30am
30 2 * * * /your/command
Every Monday at 2:30am
30 2 * * 1 /your/command
First day of the month
0 0 1 * * /your/command
Here is a helpful text-based explanation from systutorials.com:
.—————- minute (0-59)
* * * * * command to be executed
You got it, right?
— oemb1905 2018/12/03 11:23