Solution : https://service.sap.com/sap/support/notes/1595462 (SAP Service marketplace login required)
Key words :
system->spro->sap netweaver->general settings->time zones->maintain system settings, operating system time zones, system time fields tells, grc system 'system time', system->system tab->status, time zone settings, system 'system time', operating system time, system time zone, menu 'system -> status'
Related Notes :
| 926290 | SWNCCOLL: SAP workload NW collector collects no data |
| 741734 | Incorrect times due to the time zone settings |