This has recently come up because the python-vobject guys just changed their date formatting to the ISO 8601:2004 standard as mentioned in 4.3.2 - Basic format
This resembles this:
19850412T101530Z
I went to moan at them but then saw that in RFC 6350 section 4.3 it says "Only the basic format is supported" - so actually that change is correct.
I think the datetime (at least for REV) looks like this: 2018-07-17T13:09:54Z for ez-vcard. I may be way off the mark... I used davdroid to test.
This has recently come up because the python-vobject guys just changed their date formatting to the ISO 8601:2004 standard as mentioned in
4.3.2 - Basic format
This resembles this:
19850412T101530Z
I went to moan at them but then saw that in RFC 6350 section 4.3 it says "Only the basic format is supported" - so actually that change is correct.
I think the datetime (at least for REV) looks like this:
2018-07-17T13:09:54Z
for ez-vcard. I may be way off the mark... I used davdroid to test.