# Command Scheduler

Certain commands (e.g., [backup interval](/island-router-cli-2.3.2/commands/backup/backup-interval.md)) cause an action to occur at regular intervals. In most cases, the start time is not specified by the user, but is calculated by the system. In those cases, the actual clock times for command execution are calculated based on midnight (local system time) on the day the command was issued. For intervals of one week or greater, the times are calculated based on midnight (00:00) Wednesday.

Examples:

<table><thead><tr><th width="149">Interval</th><th>Actual Execution Times</th></tr></thead><tbody><tr><td>4 hours</td><td>00:00, 04:00, 08:00, 12:00, 16:00, and 20:00 each day</td></tr><tr><td>18 hours</td><td>00:00 and 18:00 on the first day and 12:00 on the second day</td></tr><tr><td>36 hours</td><td>00:00 on the first day and 12:00 on the second day</td></tr><tr><td>9 days</td><td>Every 9 days starting at 00:00 on Wednesday</td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.islandrouter.com/island-router-cli-2.3.2/command-scheduler.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.