[tz] [PATCH] tzdata: Asia/Ha_Noi: Add new timezone

[Brian Inglis]

On 2014-10-13 01:16, Trần Ngọc Quân wrote:
> On 13/10/2014 11:21, Brian Inglis wrote:
>> On 2014-10-12 18:29, Trần Ngọc Quân wrote:
>>> On 12/10/2014 22:16, Paul Eggert wrote:
>>>> Trần Ngọc Quân wrote:
>>>>> -                       8:00    -       IDT     1954 Nov  1
>>>>> +                       8:00    -       IDT     1954 Nov  10
>>>>
>>>> Thanks, but where did the "10" come from?
>>> "1954 Nov  10" is the day that "Government of the Democratic Republic of
>>> Vietnam" returned Hanoi.
>>>> Is there a source that we can cite? The cited web page
>>>> <http://www.thoigian.com.vn/?mPage=P80D01> says this:
>>>>
>>>> "Ngày 1/4/1947. Theo nghị định ngày 28/3/1947 của chính quyền thực dân
>>>> (Công báo Đông Dương ngày 14/10/1947) thì trong các vùng bị tạm chiếm
>>>> ở Việt Nam, ở Lào và Campuchia giờ chính thức là múi giờ 8 kể từ ngày
>>>> 1/4/1947. Tuy nhiên trong các vùng giải phóng vẫn giữ múi giờ 7 và sau
>>>> Hiệp định giơnevơ các vùng giải phóng ở miền bắc cũng theo múi giờ 7
>>>> (Hà nội từ 10/1954 và Hải phòng cuối tháng 5/1955); riêng Lào trở lại
>>>> múi giờ 7 vào ngày 15/4/1955."
>>>>
>>>> "Hanoi from the end of October 1954 and Haiphong from the end of May
>>>> 1955",
>>> Yes, It don't specify day.
>>> Must translate "since" or "from begin of" not "from the end of".
>>> I've contacted Dr. Lân yesterday. And I will confirm all information
>>> with him.
>>
>> The translation would need to be:
>> (Hanoi after 10/1954 and Hai Phong from the end of the month 5/1955.)
>> but would that not require "sau" (after), rather than "từ" (from or
>> "since"),
>> or else "từ đầu" ("from the beginning of" or 'from the start of'),
>> which would exclude 10.11.1954 (10 November 1954).
> Not "after", You translate Hai Phong ok
>>From origin document, It mean "Hanoi apply GMT +7 since October 1954"
> (Maybe 1st of October 1954, or one of day of this month).
> About 10 or 11, I will confirm later. And also need to verify 2nd or 3th
> of September 1945.
> I have a question:
> # Zone    NAME        GMTOFF    RULES    FORMAT    [UNTIL]
> So if time not specify, like:
>                         8:00    -       IDT     1954 Nov  10
> So IDT timezone end in 23:59  1954 Nov  10 or end of the previous day (9)?
> I read zic(1), and think it mean 1954 Nov  10 00:01? Is it true?

If it was "one day of this month" then that would imply some date
in October 1954, and exclude 10th November 1954.

In original rule 1954-10-31 24:00:00 local time == 1954-11-01 00:00:00 local time;
in revised rule  1954-11-09 24:00:00 local time == 1954-11-10 00:00:00 local time.
-- 
Take care. Thanks, Brian Inglis