Condolences to you. I wish I could say anything more that would be directly helpful.

There’s some great stuff here already but it might be worth a reference to:

“It must be Thursday, thought Arthur. I never could get the hang of Thursdays.”

There’s a few quotes from Adams’ Dirk Gently books that might be good too, depending on what fits:

“He had a tremendous propensity for getting lost when driving. This was largely because of his method of “Zen” navigation, which was simply to find any car that looked as if it knew where it was going and follow it. The results were more often surprising than successful, but he felt it was worth it for the sake of the few occasions when it was both.”

“I may not have gone where I intended to go, but I think I have ended up where I needed to be.”

 -Long Dark Teatime Of The Soul

“...his horoscope had been pretty misleading as well. It had mentioned an unusual amount of planetary activity in his sign and had urged him to differentiate between what he thought he wanted and what he actually needed, and suggested that he should tackle emotional or work problems with determination and complete honesty, but had inexplicably failed to mention that he would be dead before the day was out.”

 - Holistic Detective Agency

Yeah, you’ve already picked up on it but u/naturalnumbers second point explains that cycling thing. There’s a point somewhere around 2/3 in where you suddenly realise why everything keeps cycling around certain events and it all just hits you in one go. One of my absolute favourites, this book.