[##:##] Command : disable
No updates will fire if you disable them. The show updates command will report the fact.
Disabling updates this way does not stop the Empire clock. Stuff using the clock, like BTU growth, continues normally. Should a scheduled update be actually missed, however, the Empire clock automatically recalibrates, to maintain the fixed number of ETUs between updates. This effectively stops the clock.
You should not use this command as a tool for implementing your update schedule! Enabling and disabling updates by hand is far too error prone, and your players can't trust the show command to find out when the next update really is. Use the update schedule file instead.