National Cheese Souffle Day and I love Reese’s Day in USA
National Cheese Souffle Day and I love Reese’s Day in USA is held on May 18. This event in the second decade of the month May is annual. 
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The word soufflé first appeared in English in Louis Ude's The French Cook, 1813, and by 1845 was so commonly accepted that in Eliza Acton's Modern Cookery a recipe for soufflé was included as just another recipe.
I Love Reese’s Day was born (2016). A couple of years ago “nearly 40,000 fans” joined an online campaign on Reese’s Facebook page to say they loved Reese’s Peanut Butter cups and wanted America’s best-known cup of peanut butter and chocolate to have its own day.
Similar holidays and events, festivals and interesting facts
World Whisky Day on May 17 (Third Saturday of May);
National Cherry Cobbler Day in USA on May 17
May Restaurant Day on May 17 (is occurs once per season. The third Saturday of February, May, August, and November);
National Pinot Grigio Day in USA on May 17 (You must be 21 or older to host this event);
Walnut Day on May 17
National Marshmallow Day in Melbourne, Australia on May 18
National Devil’s Food Cake Day in USA on May 19