ACF supports the shortcut mask "iso" for DateTimeFormat()
Lucee doesn't and returns "i13o"
can you please this build a try
, I've checked this ticket and the issue was solved in lucee latest version 22.214.171.124-SNAPSHOT. Now lucee uses both "iso8601" and "iso". And I added a fixed version too.
ACF 2021 on trycf seems to always return with a Z
Lucce 126.96.36.199 seems to use the local timezone
both are valid iso formats
I've checked the above examples with both lucee and ACF2021 commandbox local returns same. Trycf page only returns datetime with "Z".