Befürworter
Standardzeit bzw. die geographisch korrekte Zeitzone wird befürwortet von:
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Deutsche Gesellschaft für Schlafforschung und Schlafmedizin (DGSM)
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Society for Light Treatment & Biological Rhythms
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Australasian Chronobiology Society
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Curtis Clock Lab
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Chronobiology Lab Groningen
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Dutch Sleep Medicine Association
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Francophone Chronobiology Society
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Northwest Noggin Neuroscience
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Capitol Neurology
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Daylight Academy
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National Education Association
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B-Society
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National School Boards Association
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National PTA
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The Dutch National Institute for Public Health and the Environment (RIVM)
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National Commission for the Rationalization of Spanish Hours (ARHOE)
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Advisory board for time reform of the Catalan Government (Generalitat de Catalunya)
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National Commission for the Rationalization of Spanish Hours (ARHOE)
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Belgian Association for Sleep Research and Sleep Medicine (BASS)
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American Federation of Teachers
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Association of Canadian Ergonomists
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Ohio Bicycle Federation
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Rabbinical Council of America
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Rabbinical Council of California
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Agudath Israel of America
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Agudath Israel of California
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Agudath Israel of Florida
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Agudath Israel of Chicago
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Adath Israel San Francisco
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Cuyahoga Astronomical Association
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Stephens Memorial Observatory
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Gnomonicae Societas Austriaca
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Saratov for a Healthy Time
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ACHED