Military
Military Date-Time Group (DTG): Format, Examples and How to Read It
How to read and write a military date-time group (DTG) such as 091530Z NOV 26: day, time, time zone letter, month and year, with examples and common mistakes.
By Free Military Time Calculator Team ·
A military date-time group (DTG) writes a date and time in one string, DDHHMMZ MON YY: 091530Z NOV 26 means the 9th day, 1530 Zulu, November 2026. Military messages use the DTG so every reader knows the exact moment, in one time zone.
The DTG Format
| Part | Example | Meaning |
|---|---|---|
| DD | 09 | Day of the month |
| HHMM | 1530 | Time in military format |
| Z | Z | Time zone letter (Z = Zulu/UTC) |
| MON | NOV | Month, 3 letters |
| YY | 26 | Year, 2 digits |
How to Read a DTG
To read a DTG, split it after the day, the time and the zone letter.
- 251430Z DEC 26 → 25 December 2026, 1430 UTC (9:30 AM Eastern Standard Time).
- 010000Z JAN 27 → 1 January 2027, 0000 UTC (midnight Zulu).
- 150800R MAR 27 → 15 March 2027, 0800 in the Romeo zone (UTC−5).
How to Write a DTG
- Write the day with 2 digits: 9 → 09.
- Add the military time: 3:30 PM → 1530.
- Add the zone letter: Z for UTC, or the local zone letter.
- Add the 3-letter month and the 2-digit year.
3:30 PM UTC on 9 November 2026 → 091530Z NOV 26.
Why the DTG Uses Zulu
Units in different time zones read the same message. Writing the DTG in Zulu means 091530Z is one moment everywhere. Local zone letters such as R or J are used when local time matters, such as a unit schedule.
Converting a DTG to Local Time
Convert the time from Zulu to the local zone and check the date: 090300Z NOV 26 in Pacific Standard Time (UTC−8) is 0300 − 8 = −5 → 1900 on 8 November, the previous day.
Common Mistakes
- Dropping the leading zero in the day: 91530Z instead of 091530Z.
- Mixing zones: writing local time with a Z.
- Forgetting the date change when converting across midnight.
Convert Zulu to any zone with the military time zone converter and read more in Zulu time explained.