Celebrato nei paesi (+1):
Stati Uniti.National Buttercrunch Day negli altri anni
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| National Buttercrunch Day 2201 | |
| National Buttercrunch Day 2202 | |
| National Buttercrunch Day 2203 | |
| National Buttercrunch Day 2204 | |
| National Buttercrunch Day 2205 | |
| National Buttercrunch Day 2206 |