@jgold Does it work for you as expected?
DAVdroid 18.104.22.168 REV date-time format for 3.0 vcards
when changing a contact stored in vcard version 3.0, DAVdroid uses a wrong timestamp format in the REV field.
Expected format (https://tools.ietf.org/html/rfc2426#section-3.6.4) : REV:2018-03-21T08:48:10Z
Actual format (DAVdroid 22.214.171.124): REV:20180321T084810Z
DAVdroid seems to use the vcard 2.1 time stamp format for 3.0 vcards.
(issue was present as well in 1.9.7)
Type name: REV
Type value: The default is a single date-time value. Can also be reset to a single date value.
“date”, “time”, and “date-time”: Each of these value types is based on a subset of the definitions in ISO 8601 standard. Profiles MAY place further restrictions on “date” and “time” values. Multiple “date” and “time” values can be specified using the comma-separated notation, unless restricted by a profile.
Examples for “date-time”:
(note the bold text)
I don’t see any error here. Please provide more details about why you think the used date-time format is wrong.
You’re right. Sorry, I missed that section 5.8.4 declares the format w/o hyphens and colons valid as well. VCard offers way too many formats to express the same thing…
Topic can be closed.