When I use the datetime() function in a Cypher Create query I see the value below in Memgraph lab.

{
   "year": 2024,
   "month": 11,
   "day": 23,
   "hour": 22,
   "minute": 40,
   "second": 32,
   "nanosecond": 960870000,
   "timeZoneOffsetSeconds": 0,
   "timeZoneId": "Etc/UTC"
}

But when I try with rsmgclient I get the error "wrong value marker" from the client. I previously used localdatetime() function and that worked fine. But it is missing the timezone.

Could this be because support for ZonedDateTime is missing from the client?

It was released before summer as far as I can see
https://memgraph.com/docs/release-notes#memgraph-v2170---may-22-2024