Table list used by SAP ABAP Function Module /OSP/SYSTEM_GET_TZONE (API to read system timezone.)
SAP ABAP Function Module /OSP/SYSTEM_GET_TZONE (API to read system timezone.) is using
# Object Type Object Name Object Description Note
     
1 Table  TTZCU Customizing time zones
2 Table  TTZZ Time zones SOURCE VALUE(TZONE_SYSTEM) LIKE TTZZ-TZONE