zero shadow day

proper noun

A semiannual day on which the astronomical phenomenon will occur where vertical objects cast no observable shadow at solar noon; see Lahaina Noon.

“A zero shadow day happens twice a year.”

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Meanings

zero shadow day1

nounzero shadow day (plural zero shadow days)

plural zero shadow days

  1. Alternative letter-case form of Zero Shadow Day or an instance of a Zero Shadow Day.

    A zero shadow day happens twice a year.

Zero Shadow Day2

proper noun

alternative zero shadow day · alternative zero-shadow day

  1. A semiannual day on which the astronomical phenomenon will occur where vertical objects cast no observable shadow at solar noon; see Lahaina Noon.
Cite this entry
APA

zero shadow day. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/zero%20shadow%20day

MLA

“zero shadow day.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/zero%20shadow%20day. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “zero shadow day,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/zero%20shadow%20day.

Source: zero shadow day on Wiktionary, CC BY-SA 4.0.