There is no official type of leave called SDO or CTO or anything other than what is in the leave manual and they should never show up on a leave pass. By definition, the way to deal with these kinds of situations is to grant short leave, one of the purposes of which is to, "...compensate, in part, for long hours worked during extended periods of operations/training or working on normal days of rest".
I know that doesn't satisfy everyone or every situation though, which is why non-standard and unofficial leave policies start happening at the local level...
Edit to add: but the best way to deal with recurring instances of non-standard work hours such as happen at a Reserve Unit with the RFC and Class B folks when they have to work both daytime and evenings regularly over the course of the week is to publish a standing order that details their working hours. That way if they are not scheduled to work as per the standing order, it becomes a weekend day as per the shift worker clause.