I obtained a copy of Trần Tiến Bình's 2005 book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)", verified that www.thoigian.com.vn's page is a verbatim quote of a passage in pages 45-50, and added a list of Trần's sources for his pp 49-50. --- asia | 25 +++++++++++++++++-------- backzone | 6 +++--- 2 files changed, 20 insertions(+), 11 deletions(-) diff --git a/asia b/asia index 851e6f8..37b2c88 100644 --- a/asia +++ b/asia @@ -2774,16 +2774,14 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 # The English-language name of Vietnam's most populous city is "Ho Chi Minh # City"; use Ho_Chi_Minh below to avoid a name of more than 14 characters. -# From Paul Eggert (2014-10-04) after a heads-up from Trần Ngọc Quân: +# From Paul Eggert (2014-10-21) after a heads-up from Trần Ngọc Quân: +# Trần Tiến Bình's authoritative book "Lịch Việt Nam: thế kỷ XX-XXI (1901-2100)" +# (Nhà xuất bản Văn Hoá - Thông Tin, Hanoi, 2005), pp 49-50, +# is quoted verbatim in: # http://www.thoigian.com.vn/?mPage=P80D01 -# lists helpful info, translated by Brian Inglis in: +# is translated by Brian Inglis in: # http://mm.icann.org/pipermail/tz/2014-October/021654.html -# The info cites an authoritative book by Trần Tiến Bình; a 2014 edition is -# "Lịch Việt Nam: thế kỉ XX-XXI (1901-2100) & niên biểu lịch sử Việt Nam" -# http://bookaholic.vn/lich-viet-nam-the-ki-xx-xxi-1901-2100-va-bien-bieu-lich... -# I have asked my library for its copy of the book (a 2005 edition) -# and plan to check that. In the meantime the summary in Thời gian is much -# better than Shanks, and is the basis for the following info. +# and is the basis for the information below. # # The 1906 transition was effective July 1 and standardized Indochina to # Phù Liễn Observatory, legally 104 deg. 17'17" east of Paris. @@ -2803,6 +2801,17 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 # To 07:00 on 1955-07-01 in South Vietnam. # To 08:00 on 1959-12-31 at 23:00 in South Vietnam. # To 07:00 on 1975-06-13 in South Vietnam. +# +# Trần cites the following sources; it's unclear which supplied the info above. +# +# Hoàng Xuân Hãn: "Lịch và lịch Việt Nam". Tập san Khoa học Xã hội, +# No. 9, Paris, February 1982. +# +# Lê Thành Lân: "Lịch và niên biểu lịch sử hai mươi thế kỷ (0001-2010)", +# NXB Thống kê, Hanoi, 2000. +# +# Lê Thành Lân: "Lịch hai thế kỷ (1802-2010) và các lịch vĩnh cửu", +# NXB Thuận Hoá, Huế, 1995. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Ho_Chi_Minh 7:06:40 - LMT 1906 Jul 1 diff --git a/backzone b/backzone index 1a7cc3e..29320aa 100644 --- a/backzone +++ b/backzone @@ -333,8 +333,8 @@ Link Asia/Chongqing Asia/Chungking # Vietnam # From Paul Eggert (2014-10-13): # See Asia/Ho_Chi_Minh for the source for this data. -# Trần's book is quoting as saying the 1954-55 transition to 07:00 -# in Hanoi was in October 1954, with exact date and time unknown. +# Trần's book says the 1954-55 transition to 07:00 in Hanoi was in +# October 1954, with exact date and time unspecified. Zone Asia/Hanoi 7:03:24 - LMT 1906 Jul 1 7:06:30 - PLMT 1911 May 1 7:00 - ICT 1942 Dec 31 23:00 @@ -391,7 +391,7 @@ Zone Asia/Tel_Aviv 2:19:04 - LMT 1880 # Laos # From Paul Eggert (2014-10-11): # See Asia/Ho_Chi_Minh for the source for most of this data. -# Trần's book is quoted as saying that Laos reverted to UT+7 on 1955-04-15. +# Trần's book says that Laos reverted to UT+7 on 1955-04-15. # Also, guess that Laos reverted to UT+7 on 1945-09-02, when Vietnam did; # this is probably wrong but it's better than guessing no transition. Zone Asia/Vientiane 6:50:24 - LMT 1906 Jul 1 -- 1.9.3