uhr - A no_std wall clock
uhr aims to provide a generic abstraction for a time zone aware wall clock, as well as alarms associated with wall clock time.
It is intended to be used with a Real Time Counter, or any other "ticking" peripheral that can be used to increment a counter.
It is NOT a monotonic clock, and is not suitable as a replacement for Instants and other similar structures. Time may move forward or backwards, due to time zone or daylight savings changes, or minor clock corrections provided by a more reliable source.