[BUG] Use plain date string in the .nfo

[warrigt]

Posting this here for visibility as it's also an issue with Plex's NFO agent.

Original post kieraneglin#893
Is your feature request related to a problem? Please describe.
Jellyfin 10.11.x has an issue with the date format. Jellyfin expects a plain date string, no time component, no timezone suffix. So this 2026-04-26 00:00:00Z is not getting picked up properly.

Describe the solution you'd like
An optional toggle in the Media Profile setting to only provide a plain date string 2026-04-26 .

Describe alternatives you've considered
Running a separate script to clean up the dates

Additional context
None

[salvageop]

I searched what timestamps are supported across Jellyfin, Emby, Plex and Kodi - some are more lenient and have more relaxed support that matches the "2026-04-26 00:00:00Z" example but all agree on basically wanting just the date. Therefore I don't think this needs a toggle and should be considered a bug fix instead.