A UTC day/hour/minute time reference used across weather products. The day field is optional because some time references omit it (e.g. "0200Z" has only hour and minute, while "050200Z" includes the day).
Optional
Day of month (UTC, 1-31). Omitted when the time reference has no day component.
Hour (UTC, 0-23).
Minute (UTC, 0-59).
A UTC day/hour/minute time reference used across weather products. The day field is optional because some time references omit it (e.g. "0200Z" has only hour and minute, while "050200Z" includes the day).