Whitsunday

[ hwit-suhn-dey, -dee, wit-; hwit-suh n-dey, wit- ]

/ ˈʰwɪtˈsʌn deɪ, -di, ˈwɪt-; ˈʰwɪt sənˌdeɪ, ˈwɪt- /

noun

the seventh Sunday after Easter, celebrated as a festival in commemoration of the descent of the Holy Spirit on the day of Pentecost.

Origin of Whitsunday

before 1100; Middle English whitsonenday, Old English Hwīta Sunnandæg white Sunday; probably so called because the newly baptized wore white robes on that day

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for whitsunday

I must, therefore, fairly warn you to remove from my house at Whitsunday.
Life and Correspondence of David Hume, Volume II (of 2)|John Hill Burton
The tower was nearly four years in building, and was dedicated on Whitsunday 1868.
Bell's Cathedrals: The Cathedral Church of Manchester|Thomas Perkins
And yet, since Whitsunday is but a few days away, that should be no hard matter.
In the Court of King Arthur|Samuel Lowe
It was the feast of Whitsunday, which probably brought a greater throng than usual abroad.
Passages From the French and Italian Notebooks, Volume 1|Nathaniel Hawthorne

Cape Gloucester was reached in about three hours after we had issued from the Whitsunday Passage.
The Last Voyage|Lady (Annie Allnutt) Brassey

British Dictionary definitions for whitsunday

Whitsunday

/ (ˌhwɪtˈsʌndɪ, ˌwɪt-) /

noun

(in Scotland) May 15, one of the four quarter days

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012