[tz] DST existed in Portugal 1950
Michael H Deckers
michael.h.deckers at googlemail.com
Wed Feb 10 21:31:59 UTC 2021
# the following is based on the list
[http://oal.ul.pt/documentos/2018/01/hl1911a2018.pdf]
# with the kind help of Suzana Ferreira of the Observatório Astronómico
de Lisboa (OAL)
# 1916
# [https://dre.pt/application/file/267096.pdf] Decreto n.º 2433 -
Diário do Govêrno n.º 115/1916, Série I de 1916-06-09
# legal time switches from 1916-06-17T23 to 1916-06-18T00, applies
to "continente da República", not to Madeira, Azores
# [https://dre.pt/application/file/590867.pdf] Decreto n.º 2712 -
Diário do Govêrno n.º 218/1916, 1º Suplemento, Série I de 1916-10-28
# legal time switches back from 1916-11-01T01 to 1916-11-01T00
# 1917..1922
# [https://dre.pt/application/file/261799.pdf] Decreto n.º 2922 Art 7.°
- Diário do Govêrno n.º 257/1916, Série I de 1916-12-30
# legal time switches to UT + 01 h on March 01 and back to UT on Oct
31 -- no time of day is indicated
# The decree is about economy during the war -- the time steps are
meant to save energy
# [https://dre.pt/application/file/495199.pdf] Decreto n.º 3446 -
Diário do Govêrno n.º 175/1917, Série I de 1917-10-11
# alters previous decree n.º 2922: legal time switches back on Oct
14 from 24:00 to 23:00
# this applies for 1917 "nas ilhas adjacentes" [Madeira, Azores]
only two days after the published decree has arrived at these islands
# 1922..1924
# [https://dre.tretas.org/dre/2417587.dre.pdf] Decreto 8038, Diário do
Govêrno n.º 36/1922 Série I de 18 de Fevereiro
# revokes previous 2 decrees n.º 2922, n.º 3446
# 1924
# [https://dre.pt/application/file/652036.pdf] Decreto n.º 9592 -
Diário do Govêrno n.º 82/1924, Série I de 1924-04-14
# legal time switches from 1924-04-16T23 to 1924-04-17T00 and from
1924-10-05T00 to 1924-10-04T23
# the decree gives railway, telegraphy connections with France and
Spain as reasons -- in fact, the switches agree with France until 1940-02-25
# 1926
# [https://dre.pt/application/file/207683.pdf] Decreto n.º 11574 -
Diário do Govêrno n.º 79/1926, Série I de 1926-04-14
# legal time switches from 1926-04-17T23 to 1926-04-18T00 and
[incorrectly] from 1926-10-05T00 to 1926-10-04T23
# [https://dre.pt/application/file/159066.pdf] Decreto n.º 12411 -
Diário do Govêrno n.º 219/1926, Série I de 1926-10-01
# legal time switches from 1926-10-03T00 to 1926-10-02T23 --
corrected to a Sunday
# the decree notes that Spain has the same step (even though tzdb
does not, which is an error)
# 1927
# [https://dre.pt/application/file/645643.pdf] Decreto n.º 13384 -
Diário do Govêrno n.º 67/1927, Série I de 1927-04-01
# legal time switches from 1927-04-09T23 to 1927-04-10T00, back in
October
# mentions Britain, France, Spain with the same step
# [https://dre.pt/application/file/677293.pdf] Decreto n.º 14312 -
Diário do Govêrno n.º 211/1927, Série I de 1927-09-23
# legal time switches from 1927-10-02T00 to 1927-10-01T23, notes the
same step in Britain, France, Spain
# 1928
# [https://dre.pt/application/file/645643.pdf] Decreto n.º 15321 -
Diário do Govêrno n.º 79/1928, Série I de 1928-04-05
# legal time switches from 1928-04-14T23 to 1928-04-15T00, back in
October
# [https://dre.pt/application/file/607442.pdf] Decreto n.º 15984 -
Diário do Govêrno n.º 224/1928, Série I de 1928-09-28
# legal time switches from 1928-10-07T00 to 1928-10-06T23
# 1929
# [https://dre.pt/application/file/355847.pdf] Decreto n.º 16704 -
Diário do Govêrno n.º 80/1929, Série I de 1929-04-10
# legal time switches from 1929-04-20T23 to 1929-04-21T00
# One part of the decree incorrectly specifes the jump from from
1929-04-21T23 to 1928-04-22T00.
# [https://dre.pt/application/file/291174.pdf] Decreto n.º 17403 -
Diário do Govêrno n.º 225/1929, Série I de 1929-10-01
# legal time switches from 1929-10-06T00 to 1929-10-05T23
# 1931
# [https://dre.pt/application/file/212357.pdf] Decreto n.º 19522 -
Diário do Govêrno n.º 73/1931, Série I de 1931-03-28
# legal time switches from 1931-04-18T23 to 1931-04-19T00
# [https://dre.pt/application/file/501959.pdf] Decreto n.º 20335 -
Diário do Govêrno n.º 219/1931, Série I de 1931-09-22
# legal time switches from 1931-10-04T00 to 1931-10-03T23
# 1932
# [https://dre.pt/application/file/523105.pdf] Decreto n.º 20963 -
Diário do Govêrno n.º 54/1932, Série I de 1932-03-04
# legal time switches from 1932-04-02T23 to 1932-04-03T00 and from
1932-10-02T00 to 1932-10-01T23
# [https://dre.pt/application/file/524308.pdf] Decreto n.º 21098 -
Diário do Govêrno n.º 89/1932, Série I de 1932-04-15
# the decree n.º 20963 applies only to the continent [not to
Madeira, Azores]
# 1934
# [https://dre.pt/application/file/672895.pdf] Decreto-Lei n.º 23722 -
Diário do Govêrno n.º 73/1934, Série I de 1934-03-29
# legal time on the continent switches from 1934-04-07T23 to
1934-04-08T00 and from 1934-10-07T00 to 1932-10-06T23
# 1935
# [https://dre.pt/application/file/379437.pdf] Decreto n.º 25144 -
Diário do Govêrno n.º 63/1935, Série I de 1935-03-19
# legal time on the continent switches from 1935-03-30T23 to
1935-03-31T00 and from 1935-10-06T00 to 1935-10-05T23
# the first decree using the term "hora normal" (normal time) for
legal time while not advanced.
# 1936
# [https://dre.pt/application/file/690895.pdf] Decreto-Lei n.º 26460 -
Diário do Govêrno n.º 71/1936, Série I de 1936-03-26
# legal time on the continent switches from 1936-04-18T23 to
1935-04-19T00
# [https://dre.pt/application/file/322214.pdf] Decreto-Lei n.º 27034 -
Diário do Govêrno n.º 226/1936, Série I de 1936-09-25
# legal time on the continent switches from 1936-10-04T00 to
1936-10-03T23
# 1937
# [https://dre.pt/application/file/418561.pdf] Decreto-Lei n.º 27591 -
Diário do Govêrno n.º 65/1937, Série I de 1937-03-19
# legal time on the continent switches from 1937-04-03T23 to
1937-04-04T00 and from 1937-10-03T00 to 1937-10-02T23
# 1938
# [https://dre.pt/application/file/230201.pdf] Decreto-Lei n.º 28534 -
Diário do Govêrno n.º 64/1938, Série I de 1938-03-19
# legal time on the continent switches from 1938-03-26T23 to
1938-03-27T00
# [https://dre.pt/application/file/351409.pdf]
# legal time on the continent switches from 1938-10-02T00 to
1938-10-01T23
# 1939
# [https://dre.pt/application/file/424614.pdf] Portaria n.º 9187 -
Diário do Govêrno n.º 72/1939, Série I de 1939-03-28
# legal time switches from 1939-04-15T23 to 1939-04-16T00 and from
1939-10-08T00 --> 1939-10-07T23
# [https://dre.pt/application/file/186980.pdf] Portaria n.º 9334 -
Diário do Govêrno n.º 235/1939, Série I de 1939-10-07
# delays the return of legal time to normal time to the switch from
1939-11-19T00 to 1939-11-18T23
# 1940
# [https://dre.pt/application/file/189055.pdf] Portaria n.º 9465 -
Diário do Govêrno n.º 39/1940, Série I de 1940-02-17
# legal time switches from 1940-02-24T23 to 1940-02-25T00
# [https://dre.pt/application/file/189055] Portaria n.º 9658 - Diário
do Govêrno n.º 233/1940, Série I de 1940-10-07[sic]
# legal time switches from 1940-10-08T00 to 1940-10-07T23
# 1941
# [https://dre.pt/application/file/416897] Portaria n.º 9764 - Diário
do Govêrno n.º 70/1941, Série I de 1941-03-26
# legal time switches from 1941-04-05T23 to 1941-04-06T00
# [https://dre.pt/application/file/370763] Portaria n.º 9900 - Diário
do Govêrno n.º 225/1941, Série I de 1941-09-26
# legal time switches from 1941-10-08T00 to 1941-10-07T23
# 1942
# [https://dre.pt/application/file/168477.pdf] Portaria n.° 10:034 of
1942-03-02
# legal time switches from 1942-03-14T23 to 1942-03-15T00 and from
1942-04-25T23 to 1942-04-26T00
# and from 1942-08-16T00 to 1942-08-15T23 and from
1942-10-25T00 to 1942-10-24T23
# the first decree using the term "hora de verão" (summer time) for
legal time while advanced.
# 1943
# [https://dre.pt/application/file/594255] Portaria n.º 10348 - Diário
do Govêrno n.º 45/1943, Série I de 1943-02-26
# legal time switches from 1943-03-13T23 to 1943-03-14T00 and from
1943-04-17T23 to 1943-04-18T00
# and from 1943-08-29T00 to 1943-08-28T23 and from
1943-10-31T00 to 1943-10-30T23
# 1944
# [https://dre.pt/application/file/272685.pdf] Portaria n.º 10612 -
Diário do Govêrno n.º 46/1944, Série I de 1944-03-04
# legal time switches from 1944-03-11T23 to 1944-03-12T00 and from
1944-04-22T23 to 1944-04-23T00
# [https://dre.pt/application/file/551545.pdf] Portaria n.º 10727 -
Diário do Govêrno n.º 182/1944, Série I de 1944-08-18
# legal time switches from 1944-08-27T00 to 1944-08-26T23
# [https://dre.pt/application/file/561947.pdf] Portaria n.º 10760 -
Diário do Govêrno n.º 229/1944, Série I de 1944-10-18
# legal time switches from 1944-10-29T00 --> 1944-10-28T23
# 1945
# [https://dre.pt/application/file/624750.pdf] Portaria n.º 10889 -
Diário do Govêrno n.º 47/1945, Série I de 1945-03-05
# legal time switches from 1945-03-10T23 to 1945-03-11T00 and from
1945-04-21T23 to 1945-04-22T00
# [https://dre.pt/application/file/521356.pdf] Portaria n.º 11059 -
Diário do Govêrno n.º 178/1945, Série I de 1945-08-10
# legal time switches from 1945-08-26T00 to 1945-08-25T23 and from
1945-10-28T00 to 1945-10-27T23
# 1946
# [https://dre.pt/application/file/338912.pdf] Portaria n.º 11299 -
Diário do Governo n.º 61/1946, Série I de 1946-03-22
# legal time switches from 1946-04-06T23 to 1946-04-07T00 and from
1946-10-06T00 to 1946-10-05T23
# applies to continental PT, Madeira and Azores
# 1947
# [https://dre.pt/application/file/414737.pdf] Portaria n.º 11767 -
Diário do Governo n.º 71/1947, Série I de 1947-03-28
# legal time switches from 1947-04-06T02 to 1947-04-06T03 and from
1947-10-05T03 to 1947-10-05T02
# applies to continental PT, Madeira and Azores
# 1948
# [https://dre.pt/application/file/153017.pdf] Portaria n.º 12286 -
Diário do Governo n.º 40/1948, Série I de 1948-02-19
# legal time switches from 1948-04-04T02 to 1948-04-04T03 and from
1948-10-03T03 to 1948-10-03T02
# applies to continental PT, Madeira and Azores
# 1949..1966.5
# [https://dre.pt/application/file/373876.pdf] Decreto-Lei n.° 37:048
DIARIO DO GOVERNO - 1.ª SERIE, Nº 209, de 1948-09-07, Pág. 953 - 954
# legal time of the country switches on Apr 1st Sun from 02 to 03
and Oct 1st Sun from 03 to 02
# applies to continental PT, Madeira and Azores
# 1966.5..1975.5
# [https://dre.pt/application/file/293829] Decreto-Lei n.º 47233 -
Diário do Governo n.º 229/1966, 1º Suplemento, Série I de 1966-10-01
# legal time of the continent and the adjacent islands, stays at the
offset attained in April
# the first decree using the term "hora de Inverno" (winter time)
for legal time while not advanced.
# 1975.5..1978, 1981..1986
# [http://publicos.pt/documento/id502063/decreto-lei-309/76]
Decreto-Lei 309/76 Diário do Governo, 1.ª SÉRIE, Nº 99, p 923..924,
1976-04-27
# legal time in continental Portugal is UT from Mar last Sun 00 UT
(unless this is Easter
# in which case it shall be the previous Sun), until Sep last Sun
00 UT
# the Comissão Permanente da Hora (Standing Commission on Time)
shall make a proposal for Madeira and Azores
# 1978
# [http://publicos.pt/documento/id383792/portaria-112/79] Portaria n.º
113/78 de 23 de Fevereiro
# legal time in continental Portugal switches from 1978-04-02T01 to
1978-04-02T02 and from 1978-10-01T02 to 1978-10-01T01
# 1979
# [http://publicos.pt/documento/id383792/portaria-112/79] Portaria
112/79, de 10 de Março
# legal time in continental Portugal switches from 1979-04-01T01 to
1979-04-01T02 and from 1979-09-30T02 to 1978-09-30T01
# 1980
# [http://publicos.pt/documento/id678862/portaria-69/80] Portaria
69/80 Ministério da Educação e Ciência 1 de Março de 1980
# legal time in continental Portugal switches from 1980-04-06T01 to
1980-04-06T02 and from 1980-09-28T02 to 1980-09-28T01
# 1986..1992.5
# [http://publicos.pt/documento/id628280/decreto-lei-44-B/86]
Decreto-Lei nº 44-B/86 de 7 de Março
# legal time in continental Portugal switches on Mar last Sun at 01
UTC from UTC to UT + 01 h
# and switches on Sep last Sun at 01
UTC from UTC + 01 h to UT
# in the territory of Portugal, legal time is based on UTC
# 1992.5..1996
# [https://dre.pt/application/file/291749] Decreto-Lei n.º 124/92 -
Diário da República n.º 150/1992, Série I-A de 1992-07-02
# legal time in continental Portugal switches on Mar last Sun at 01
UTC from UTC + 01 h to UT + 02 h
# and switches on Sep last Sun at 01
UTC from UTC + 02 h to UT + 01 h
# 1996..
# [http://publicos.pt/documento/id621299/decreto-lei-17/96] Decreto-Lei
n.º 17/96 - Diário da República n.º 58/1996, Série I-A de 1996-03-08
# legal time in continental Portugal switches on Mar last Sun at 01
UTC from UTC to UT + 01 h
# and switches on Oct last Sun at 01
UTC from UTC + 01 h to UT
# -----
Michael Deckers.
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