When I use a Custom Field with a date picker and put in 30 September 2033 (30/Sep/2033) and export it to a csv file, it converts the date to 30 September 1933 (30/Sept/1933).
Thank you for reaching out to Atlassian Community and for bringing up this bug to our attention.
I was able to test here and replicated the issue.
It happens if we add any year after 2030 and on the old view it shows incorrectly on the UI and when we export. On the new view, the issue doesn't happen, but if we export it will show the wrong year.
I created a bug for our dev team to check:
Please, click on "This affects my team" and watch to receive updates.
Remember that time you realized it was possible to refresh your Jira data in Google sheets with just one click? What if we told you that you can now get the latest data with no clicks at all?! Zero! ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events