CODEWITHSUNDEEP
timetimezoneelixirphoenix-framework
9_Dave_9
9_Dave_9

Reputation: 714

utc_offset in elixir return incorrect offset for time zones

I might not be understanding something here - but this could look more straight forward.

iex> {:ok, datetime_with_tz} = DateTime.now("Europe/London", Tzdata.TimeZoneDatabase)
{:ok, #DateTime<2020-05-02 21:57:11.136512+01:00 BST Europe/London>}

iex> DateTime.utc_now
~U[2020-05-02 20:57:21.869835Z]

//correct as it's already in utc
iex> DateTime.utc_now.utc_offset
0 

// incorrect this should be 3600 i.e +01:00 hours of offset and not 0 .. ?
iex> datetime_with_tz.utc_offset
0

Upvotes: 2

Views: 560

Answers (1)

Julio GB
Julio GB

Reputation: 447

That's because London is usually UTC+00:00, its currently +01:00 due to summer time (BST stands for British Summer Time).

DateTime have std_offset to deal with that.

iex(1)> {:ok, datetime_with_tz} = DateTime.now("Europe/London", Tzdata.TimeZoneDatabase) 
iex(2)> datetime_with_tz.std_offset
3600

Upvotes: 4

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