In the Number File Editor (user group handling) you can select messages to any specific number to be HOLD (queued) for some hours. This is very useful, for example during nights. But this function does not work across dates.
To hold messages during night, you may specify HOLD 00-07, which will queue any message request from midnight until 07 in the morning. At 07 all queued messages will be sent.
HOLD settings across midnight (for example 19-07) is not supported in current versions.