The large scale facilities BER II and BESSY II are both running 24h per day - 7d per week. On a regular basis there are breaks for maintenance.
For users of BER II neutron-scattering instruments, beamtime is allocated on a 24 hours basis; in general from 9:00 to 9:00 the following day.
For users of BESSY II instruments and stations, beamtime is allocated in days that might be broken down to shifts.
Detailed information on the status of HZB beamtime is available via GATE, but only for users connected with the respective beamtime.