Custom dates portal with gtm + 6

[AMEDRANO]

The dates of my service portal in Jira Service Desk, shows them with 6 hours of more, previously it showed according to my region, Mexico City GTM-6

[Angélica Luz]

Hi Antonio,

I tested on my local environment and even using your timezone and changing the language to Spanish, or using my timezone here GMT-3, when I select a date the time automatically changes to 12 AM, is this time that is appearing for you too?
If possible, record a gif and send for us to check and compare with what we see here.

Regards,
Angélica