Solution : https://service.sap.com/sap/support/notes/102088 (SAP Service marketplace login required)
Key words : 
technically identical local time settings, c-runtime library functions, identical local time zone, adopt daylight saving time, daylight saving time ends, daylight saving time offset, local time zone, daylight saving time, zdate/dstswitch_contloctime = offyou, standard time starts
Related Notes : 
       
| 1454474 | 0FI_GL_14: Problems with change to daylight saving time | 
| 1375438 | Globalization Collection Note | 
| 1119698 | Error in profile parameter zdate/DSTswitch_contloctime | 
| 950114 | Profile parameter zdate/DSTswitch_contloctime | 
| 438660 | End of daylight-saving time coming soon, be ready! | 
| 398374 | Problems when converting summer time <-> winter time | 
| 391658 | iSeries: Daylight saving time/standard time change | 
| 161837 | Manual change from winter to summer time | 
| 157704 | Change dayl. sav.time/std.time and loc.crcy chang. | 
| 139669 | Time synchronisation in NT Domain Time Server Net Time | 
| 15913 | Timezone problems (local vs. global time) | 
| 7417 | Conversion between standard time and daylight saving time |