[type of data: composed data—controlled terms (typed literal); not repeatable]
Optionally record the date(s) when the work was first performed, if known and if applicable. If the work was performed over a span of time, use a range of dates. If the date(s) are unknown, but an approximate date can be supplied, do so. If it is desired to record the month and day of performance, record a structured date (YYYYMMDD) for the performance date.