ONIX Code Lists Issue 22, July 2013
List 55: Date format

Value Description Notes

00 YYYYMMDD Year month day (default).
01 YYYYMM Year and month.
02 YYYYWW Year and week number.
03 YYYYQ Year and quarter (Q = 1, 2, 3, 4).
04 YYYYS Year and season (S = 1, 2, 3, 4, with 1 = “Spring”).
05 YYYY Year.
06 YYYYMMDDYYYYMMDD Spread of exact dates.
07 YYYYMMYYYYMM Spread of months.
08 YYYYWWYYYYWW Spread of week numbers.
09 YYYYQYYYYQ Spread of quarters.
10 YYYYSYYYYS Spread of seasons.
11 YYYYYYYY Spread of years.
12 Text string For complex, approximate or uncertain dates.
13 YYYYMMDDThhmm Exact time. Use ONLY when exact times with hour/minute precision are relevant. By default, time is local. Alternatively, the time may be suffixed with an optional ‘Z’ for UTC times, or with ‘+’ or ‘-’ and an hhmm timezone offset from UTC. Times without a timezone are ‘rolling’ local times, times qualified with a timezone (using Z, + or -) specify a particular instant in time.
14 YYYYMMDDThhmmss Exact time. Use ONLY when exact times with second precision are relevant. By default, time is local. Alternatively, the time may be suffixed with an optional ‘Z’ for UTC times, or with ‘+’ or ‘-’ and an hhmm timezone offset from UTC. Times without a timezone are ‘rolling’ local times, times qualified with a timezone (using Z, + or -) specify a particular instant in time.
20 YYYYMMDD (H) Year month day (Hijri calendar).
21 YYYYMM (H) Year and month (Hijri calendar).
25 YYYY (H) Year (Hijri calendar).
32 Text string (H) For complex, approximate or uncertain dates (Hijri calendar), text would usually be in Arabic script.