NMEA-0183 message: ZDA
UTC day, month, and year, and local time zone offset
An example of the ZDA message string is:
$GPZDA,172809.456,12,07,1996,00,00*45
                                                            
ZDA message fields
| Field | Meaning | 
|---|---|
| 0 | Message ID $--ZDA Talker ID can be: | 
| 1 | UTC | 
| 2 | Day, ranging between 01 and 31 | 
| 3 | Month, ranging between 01 and 12 | 
| 4 | Year | 
| 5 | Local time zone offset from GMT, ranging from 00 through ±13 hours | 
| 6 | Local time zone offset from GMT, ranging from 00 through 59 minutes | 
| 7 | The checksum data, always begins with * | 
Fields 5 and 6 together yield the total offset. For example, if field 5 is -5 and field 6 is +15, local time is 5 hours and 15 minutes earlier than GMT.