DayOfWeek represents a day of the week in the Gregorian calendar.
time = Time.local(2016, 2, 15) time.day_of_week # => Time::DayOfWeek::Monday
Each member is identified by its ordinal number starting from Monday = 1 according to ISO 8601.
#value returns this ordinal number. It can easily be converted to the also common numbering based on Sunday = 0 using value % 7.
1 2 3 4 5 6 7 Returns the day of week that has the given value, or raises if no such member exists.
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Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/0.35.1/Time/DayOfWeek.html