Jack Forster has published a fascinating piece for the watch experts at Hodinkee that takes a deep dive look at the Solar face in watchOS 6 for Apple Watch Series 4 and Series 5:

The piece is loaded with intricate details about how the admittedly complex watch face works, including a lesson on the many phases of twilight between day and night:

Forster then shows each phase from sunset to night that the Apple Watch Solar face presents. Each section is like a user guide for what Apple’s Solar face means.

Twilight has its own rich vocabulary, including the word crepuscular; “that which is related to twilight.” Animals that are chiefly active during the twilight of dawn or nightfall are called crepuscular animals; my favorite of these, and maybe yours too, is the firefly.

Read the full piece on Hodinkee.