On 2023-09-16, we had high winds and blowing snow the majority of the day and thus, halos/sundogs for most of the day. I noticed a faint halo and sundogs starting around 12Z although it was pretty cloudy and harder to make out. By 15Z, you could really see the halo and sundogs as we moved into a more scattered sky. The halo lasted all the way until around 17Z at least.