Can't write date field to Jira via External System Import nor Jira API call

[Amed Moreno]

Hi Team,

For some reason, using Jira Data Center's "External System Import" feature cannot write my date fields to the ticket.  No matter what format I update the dates to in the .csv file, I get error: "Unable to parse date".

Also, when I use a script to update via the API, I get error 405.

Is there a known limitation in Data Center that cannot update a date field via API?

Please help.

Thanks and Kind Regards,

Amed