<ct:h12> Inserts hour (e.g., 3) into the currently active window.

Command Tree:   Text, Date & Time, Keys  \  More Date & Time  \  Current time: Hour (12)
.
Syntax:   <ct:h12>(Shift)
Shift
The time shift in minutes relative to the current time.  0 for no shift, -1 for time one minute back, +1 for time one minute later, etc. 
.
.
Example:   Current time hour: <ct:h12>(0)<enter>One minute later it will be hour: <ct:h12>(1)