You can also install the community supported app "Hub Information Driver." It has sunrise and sunset times as attributes that can be displayed on a tile.
Driver is a large scale rewrite of the original driver and brings added flexibility in the gathering of ~60 attributes related to general operation of the hub. Driver allows the assignment of these attributes to one of 4 user selectable polling queues and intervals in an effort to allow the impact of the data polling to be minimized (I average around 0.12% of total or less), and the generation of an html attribute for display on a dashboard (template is a text file that may be edited to allow …