Latest version of Workbench 1.3's setclock http://obligement.free.fr/files/setclock_v34.3.lha
I believe all Amiga operating systems are capable of understanding the correct date until the year 2078, that's when it reverts back to 1978. However, Workbench 1.3 has a problem "setting" the time after the year 2000, where it can be slightly or largely off, this is where the updated setclock is required. Now I don't have a 1000, so I lack real word experience with that exact model, however until someone explains better why a 1000 would have issues with the exact same operating system a 500 uses, like Workbench 1.3, I'm inclined to want to believe even Intric8 could have the proper date and time, that there is a way for that.
The brains of the operation are not in the real time clock boards. All the boards do is keep track of years from 0 to 99. They were very simple designs in that aspect, it was the Amiga itself, rather Workbench, that took those simple 0-99 digits and translated them to the correct year and time. This is what makes me get a little wide eyed when Intric8 notes issues beyond the year 2000, as at first glance it makes little sense why a 1000 with Workbench 1.3 would not be able to translate the simple 0-99 in terms of the years that the clock board gives it. The Amiga would have had a serious Y2K issue if it had not been based on Unix originally, which in the case of the Amiga, set "year 1" as 1978. That's where the PC had its issues, the clock boards themselves were of little difference compared to the Amiga, the PCs also kept track of years 0-99, only in the case of DOS/Windows at the time, "year 1" was 1900, which meant the rollover was going to happen in the year 2000, where it's 2078 with the Amiga due its year one being 1978. DOS/Windows also were programed to show dates in the exact same way they read them from the clock, which I'm sure is the real reason why "year 1" is 1900. DOS showed the year as 85/89/94, possibly even Windows 95 was showing dates in that way. The Amiga on the other hand, while it may have at times displayed the year in two digits in programs or even in the operating system itself, always understood the year as 4 digits. It took the two digit the clock board kept track of, did some math with the loadclock command at startup, and from that point on it was 1988, 1995, and even 2019.
Unless the 1000 clock boards were even more simple than the other Amiga models and only kept track of digits from 0-30 or something similar. That sounds possible but not exactly logical. The 100 year roll over was a digit limitation in the cheaper boards used. The Amiga could very well keep on trucking on and understand it's 2178 if the clock boards did not have that two digit year limitation. The next logical digit limitation prior to 100 years would be at the 10 year mark, so a 1000 would stop knowing the correct date in 1988 if that was the case, and that would of course make no sense as it was still being sold then. It wouldn't make sense for a cheaper clock board to only count 20 to 30 years before rolling over, it would have to pass a digit limitation. The PC market was simply forced to deal with these clock counting limitations sooner than they should have because it was decided that year 1 would be 1900, 78 years before personal computers were a thing, But it was not the PC clock boards, it was DOS, it was Windows. Workbench was simply more intelligent with how it dealt with the cheap two digit clock board limitations, programing year 1 as 1978, when PCs were actually a thing! But the Amiga itself, Workbench, rater smart about this whole situation, which makes me wonder how a 1000 could have issues the other models do not. No real world experience there, so I could be wrong, but I know if I had a 1000 it would take me a long time to give up on that one.
Despite this, all Workbench versions will stop being able to load the correct date in the year 2046. At that point, it's problems with the loadclock program in all versions of the operating system that will cause the Amiga to mistranslate the clock board digits, being randomly off by a little or a lot. All Workbench versions will have this issue in 2046, and as far as I know, Hyperian does not not seem to be working on that issue with new versions... So as long as you never turn off your Amiga after 2046, you'll be good until 2078, but 2046 is the effective useless date for the Amiga, which is actually rather mind blowing considering all the issues the PC was having back then..
Though a badly written program could very well mean you're best off to still keep the date prior to 2000. The Amiga may have been able to understand the correct date, that does not mean a program necessarily does, which might cause issues.