Added in 1.8.3

/sleep <N> <command>

Execute a command after N seconds, can be used to delay channel joins while waiting for NickServ Auth.

Parameters

<N> - Seconds to delay.
<command> - Command to execute after delay.

Example

;Delay 5 seconds, then join #channel1 and #channel2
/sleep 5 /join #channel1,#channel2