A cron expression is a string of five numbers separated by white space representing, in the context of Cloud Sight, the time to start or stop a schedule.
The string is comprised of:
- Minute – a number between 0 and 59
- Hour – a number between 0 and 23 (in 24 hour time)
- Day of the month – a number between 0 and 31, depending on the month you specify in the next field
- Month – a number between 1 and 12
- Day of the week – a number between 1 and 7
You can use a * where you don’t want to specify a value. You can enter multiple numbers separated by commas for entering multiples values of a particular field, or a hyphen between numbers for a range.
e.g. the string of characters “0 9 * * 1-5” represent the 9:00am on every day of the week from Monday to Friday.
On Cloud Sight, you may use a cron expression to create your schedule. When you're adding a new schedule, select 'Custom' in the recurrence field to enter a cron expression. The time fields will automatically default to cron expressions when you're editing a schedule.
There are many cron generators that could be found with a Google search. Any would work for the purpose of creating a cron expression for your schedule.