Currently @datetime is culture sensitive which make it very inconvenient to use in most case like with APIs.
I know the following idea has been accepted but still, it would be a great addition to have @datetimeISO with ISO formats.
Source :
https://www.progress.com/blogs/understanding-iso-8601-date-and-time-format#:~:text=ISO%208601%20Formats&text=ISO%208601%20represents%20date%20and,%E2%80%94more%20on%20that%20below).