Celebrato nei paesi (+1):
Stati Uniti.National Buttercrunch Day negli altri anni
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| National Buttercrunch Day 2143 | |
| National Buttercrunch Day 2144 | |
| National Buttercrunch Day 2145 | |
| National Buttercrunch Day 2146 | |
| National Buttercrunch Day 2147 | |
| National Buttercrunch Day 2148 |