okay, so I'm almost giving up lolI know that this is a very reoccurring issue: the clock freezes at a certain sim time, things are still moving, the ambient sounds are still going but the camera and UI are stuck.
I tried doing the 50/50 test with all my cc, removed more superficial cc (as in most of my CAS cc), and now only have, nraas mods, default replacements I always used (and was never an issue), Duchess Smooth Pack and Clean UI (which I already removed before and the problem persisted)
The last 3 times that this error occured for me, I made my sim order pizza. In Sunset Valley, both tries, the delivery guy never showed up and the game froze hours later at about 1:30am to 1:40am. In Moonlight Falls, as soon as the delivery guy left the lot, the game froze.
I'm thinking that maybe it has something to do with the npc's in my game(?) I don't really know. I'll double check on my Mods folder if I have any other script mods that I'm forgetting to remove, but I don't think so.

Please clarify if you could, because one of your sentences can be taken either way. You have always used the Smoothness Patch (which version?) and you did try removing it now or not?

This page explains why I am asking. The v2 variants of that patch are not compatible with NRaas. The v1 variants are, but we can't really support the mod (or however we wish to refer to it) directly as it's not our doing. All we can do is see how the game behaves without vs. with it in play.

While we're at it, we don't yet know which NRaas mods are in play. Does your current collection in use also include, in addition to Overwatch I assume, ErrorTrap, Register, and Traffic? Are any of them, ErrorTrap in particular though, throwing any script error logs around the time this happens that we should be seeing?

As for pizza delivery never showing up, when it's not mods causing interference what that usually means is that the lot calling for delivery cannot be successfully routed to by the delivery Service Sim. I would also consider, just as tests, trying pizza delivery from a couple of other households in the affected world to try and see if the issue is specific to the home lot, the delivery sim, or the entire world being played.

In addition to the above, if it's freezing at the same time every time, using DebugEnabler's Dump All Alarms and provide the entries from the resulting script error about 20 Sim minutes before and after the freezing time.