Time.local instances: Adding 24.hours across the DST boundary adds 24 hours instead of one day [#2066 state:resolved]

Time#to_s(:rfc822) uses #formatted_offset instead of unreliable and non-standard %z directive [#1899 state:resolved]

Signed-off-by: NJoshua Peek <josh@joshpeek.com>

Add thorough tests for Time-object #past?, #future? and #today. Fix TimeWithZone #today? to use #time instead of #utc for date comparison. Update changelog. [#720 state:resolved]

Introduce convenience methods past?, today? and future? for Date and Time classes to facilitate Date/Time comparisons.

Signed-off-by: NMichael Koziarski <michael@koziarski.com>

Fix Ruby's Time marshaling bug in pre-1.9 versions of Ruby: utc instances are now correctly unmarshaled with a utc zone instead of the system local zone [#900 state:resolved]

Namespace Inflector, Dependencies, OrderedOptions, and TimeZone under ActiveSupport [#238 state:resolved]

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Add Time Zone support to ActiveRecord, and config.time_zone property for specifying a default Time Zone.  Closes #10982 [Geoff Buesing, rick]

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with_timezone test helper renamed with_env_tz, to distinguish between setting ENV['TZ'] and setting Time.zone in tests

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Time#- coerces TimeWithZone argument to a Time instance so that difference in seconds can be calculated. Closes #10914 [Geoff Buesing, yyyc514]

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Time.days_in_month defaults to current year if no year is supplied as argument, uses Date.gregorian_leap? to determine leap year, and uses constant lookup to determine days in month. Closes #10799 [Radar]

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Adding Time and DateTime #compare_with_coercion, which layers behavior on #<=> so that any combination of Time, DateTime and ActiveSupport::TimeWithZone instances can be chronologically compared

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Adding Time and DateTime #formatted_offset, for outputting +HH:MM utc offset strings with cross-platform consistency

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Honor Ruby's default calendar reform setting when creating DateTime objects via ActiveRecord's Time -> DateTime overflow, Time#time_with_datetime_fallback, Time#to_datetime, Date#to_datetime and String#to_datetime. Closes #10201

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 Change Time and DateTime #end_of_month to return last second of month instead of beginning of last day of month. Closes #10200

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