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| Zero Shadow Day This online calculator calculates the dates of zero shadow days at a given latitude. The latitude of the observation site must be south of the Tropic of Cancer and north of the Tropic of Capricorn. |
| Zero Shadow Day This online calculator calculates the dates of zero shadow days at a given latitude. The latitude of the observation site must be south of the Tropic of Cancer and north of the Tropic of Capricorn. |