Issue #20674 has been reported by moustafasallam (Moustafa Sallam Mahmoud). ---------------------------------------- Bug #20674: Time zone conversion issue Time.at https://bugs.ruby-lang.org/issues/20674 * Author: moustafasallam (Moustafa Sallam Mahmoud) * Status: Open * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- # Time.at converts the epoch time to the local time zone But there seems a weird case with Central Time (US & Canada) # where it convert it one hour earlier for example # take this timestamp 1728018000 when converted it to Central Time (US & Canada) with Time.at # => Time.zone = "Central Time (US & Canada)" # => "Central Time (US & Canada)" # => Time.at(1728018000) # => 2024-10-04 01:00:00 -0400 # While using ActiveSupport::TimeZone # ActiveSupport::TimeZone['Central Time (US & Canada)'].at(1728018000) # => Fri, 04 Oct 2024 00:00:00.000000000 CDT -05:00 # so Time.at convert it to -4 while ActiveSupport::TimeZone convert it to -5 -- https://bugs.ruby-lang.org/