# Program blocks / Date and timer operations

### Program blocks

- Date and timer operations
  - LGF_GetCalendarDay (FC / V3.0.1)
  - LGF_GetCalendarWeek_ISO (FC / V3.0.1)
  - LGF_GetCalendarWeek_US (FC / V3.0.1)
  - LGF_IsGermanHoliday (FC / V3.0.1)
  - LGF_AstroClock (FB / V3.0.1)
  - LGF_SetTime (FB / V3.0.2)
  - LGF_TimerSwitch (FB / V3.0.1)

### PLC data types

- Date and timer operations
  - LGF_typeGPS
  - LGF_typeGPS_DD
  - LGF_typeGPS_DMS