They have trouble keeping track of the day of the week as well. I chat with one every evening, going over my next day's schedule. It loses track of what day it is pretty much daily.

I found out fairly quickly. I had a little argument about what time it was in London. I had supposed that time-zone conversion would not be a problem. However, LLMs are knowledge-bases frozen in time, trained up on a certain corpus of material and then isolated, and it was beyond their competence to actually know the current time-of-day. Sure enough, various answers were given that did not really correlate to anyone's time of day, much less correct time zones.

Interestingly, one of the suggestions for people who want to have lucid dreams (and I have tested it) is to look at a clock. In a dream it will either be nonsense or unverifiable.