# start.rtc command

The start.rtc BASIC program initiates
the system’s real-time clock. This happens automatically during the
boot process, provided a real-time clock is present. If one is not
present, the current time is requested from the person standing closest
to the console.

**Synonyms:** setup.rtc

**For UNIX:** This command sets the D3 system date
and time equal to the UNIX system date and time, clearing up any discrepancies
caused by the set-date or set-time commands.

**For Windows:** Supports the system’s real-time
clock.

## See also

- [set-date command](https://d3codex.com/tcl/set-date-command/)
- [system-coldstart macro](https://d3codex.com/tcl/system-coldstart-macro/)
- [time command](https://d3codex.com/tcl/time-command/)

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Source: https://d3codex.com/tcl/start-rtc-command/ - part of the D3Codex reference.