Hi @John_V,
For recording start and end dates, please see the tags supported below:
RECORDINGDATE
Alternate spelling:PERFORMANCEDATE
Alternate spelling:RECORDING DATE
Alternate spelling:PERFORMANCE DATE
RECORDINGSTARTDATE
Alternate spelling:RECORDING START DATE
Alternate spelling:PERFORMANCE START DATE
Alternate spelling:PERFORMANCESTARTDATE
RECORDINGENDDATE
Alternate spelling:RECORDING END DATE
Alternate spellingPERFORMANCE END DATE
Alternate spelling:PERFORMANCEENDDATE