Some recent sun #halo displays I've seen in the last 2 weeks: An upper tangent arc (my first!), the top edges of a circumscribed and 22° circular halo, and most of a 22° circular halo (with bonus contrail shadow on the cloud layer!)
All shot on my Pixel 2 with levels adjusted.
These are all formed by reflection and refraction of light in ice crystals. (A great reference: https://www.atoptics.co.uk/halo/common.htm )
Also, all seen from Los Angeles, which isn't freezing...at ground level.