UTCTimeOnly fields represent a time in the UTC timezone. There are 2 valid formats:
With the sections of the format defined below
| Code | Meaning | Valid range |
|---|---|---|
| HH | Hour of day | 00-23 |
| mm | Minute of hour | 00-59 |
| ss | Second of minute | 00-60 (60 only if UTC leap second) |
| SSS | Fractions of seconds |
This field may optionally be paired with a UTCDateOnly field.
| Example | Valid | Notes |
|---|---|---|
| 01:02:03 | ||
| 01:02:03.444 | ||
| 010203.444 | Literal colons omitted |