Solution : https://service.sap.com/sap/support/notes/110540 (SAP Service marketplace login required)
Key words :
Time Zones TTZCU TTZZ TTZR TTZD TTZDF TTDDV TTZ5 TTZ5S
Related Notes :
1375438 | Globalization Collection Note |
15913 | Timezone problems (local vs. global time) |