| Name | When |
|---|---|
| International Doubles Day | May 30 |
| National Doughnut Day | Nov 5 |
| National Dr. Pepper Day | Oct 24 |
| Dreams of Reason Feast Day | Apr 14 |
| Drink 728 Day | Jul 28 |
| National Drink Beer Day | Sep 28 |
| International Drink Chenin Day | Jun |
| National Drink Coffee at the Office From a Sippy Cup Day | Aug 17 |
| Drink Local Wine Day | Oct 12 |
| Drink Local Wine Week | Oct 2nd Sun |
| National Drink Ohio Wines Day | Jun 10 |
| Drink Wine Day | Feb 18 |
| Drinking Straw Day | Jan 3 |
| National Drinking Water Month | May |
| Drinking Water Week | May Sun of Wk. 1 |
| National Drinking with Chickens Day | May 23 |
| Drive-Thru Day | Jul 24 |
| Dry Bean Day | Jan 6 |
| Dry Bean Day | Feb |
| Dry January (UK) | Jan |
| National Duckling Month | May |
| World Dulce de Leche Day (Argentina) | Oct 11 |
| National Dumpling Day | Sep 26 |
| Dunkin Iced Coffee Day | May |
| National Dunkin' Day | Sep 29 |
| International Durif Day | Jun 10 |
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