A Column or Row containing temporal data can be date only following the ISO 8601 standard (YYYY-MM-DD) and completed to known precision (e.g. YYYY-MM, YYYY). Time is not required, but all times must be preceded by a date if reported in the same columns or row. If date and time are split between two columns, call one "date" and the other "time". Times must be reported in Coordinated Universal Time (UTC) (YYYY-MM-DD hh:mm:ss) (use of "Z" and "T" characters are unnecessary) or Local Standard Time reporting offset or time zone in the File-level metadata. Do not report time using Daylight Savings Time. Complete times to known precision (e.g. YYYY-MM-DD hh). For timestamped data reported as intervals, specify the interval in the column/row name or in CSV Data Dictionary (CSV_dd). Temporal data using different standards can be provided as a separate variable (i.e., in an adjacent field) but only in addition to UTC format or Local Standard Time. In cases where the entire file consists of temporal data collected at a single date and time, the date and time must be reported in the File-level Metadata.