Bug #21141: `Time#utc?` does not work with a timezone object

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 3.1: REQUIRED, 3.2: REQUIRED, 3.3: REQUIRED, 3.4: REQUIRED

[nobu (Nobuyoshi Nakada)]

require 'timezone'
require 'tzinfo'

t = Time.now(in: "UTC")
t_timezone = Time.now(in: Timezone["UTC"])
t_tzinfo = Time.now(in: TZInfo::Timezone.get("UTC"))
p t.utc?          #=> true
p t_timezone.utc? #=> false
p t_tzinfo.utc?   #=> false

This also affects strftime("%-z").

[nobu (Nobuyoshi Nakada)]

Maybe also this is related:

ENV["TZ"] = "UTC"
p Time.now.utc? #=> false

Is it expected?
In other words, is that Time#utc? is true a special case, only when the time is created with the methods such as Time.utc, Time#utc, etc, that clearly return a UTC time object?

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|06919949a60b42a8f30e8bd0cb075e17b05eebcd.

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[Bug #21141] [DOC] Clarify what time is in UTC

[maximecb (Maxime Chevalier-Boisvert)]

Should we backport this minor doc change?