Good Afternoon,
Operations are held on the weekend (Fri, Sat, Sun) depending on the task force and training times typically follow the same schedule. Squad training times vary but are designed to accommodate all members of the squad.
For example, Havoc 3 is a part of Task Force Charlie which holds operations and training on Saturday evenings. Havoc 3-3, the squad, has squad training on Friday evenings.
Once you get through RCT and OSUT you'll be able to find out in more detail training schedules and event times.
Hopefully, this helps.
CPL Speirs