Unit that represents the concept of a day.
For the ISO calendar system, it is the standard day from midnight to midnight.
The estimated duration of a day is {@code 24 Hours}.
!(p)
When used with other calendar systems it must correspond to the day defined by
the rising and setting of the Sun on Earth. It is not required that days begin
at midnight - when converting between calendar systems, the date should be
equivalent at midday.
Unit that represents the concept of a day. For the ISO calendar system, it is the standard day from midnight to midnight. The estimated duration of a day is {@code 24 Hours}. !(p) When used with other calendar systems it must correspond to the day defined by the rising and setting of the Sun on Earth. It is not required that days begin at midnight - when converting between calendar systems, the date should be equivalent at midday.