[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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