Celebrato nei paesi (+1):
Stati Uniti.National Buttercrunch Day negli altri anni
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| National Buttercrunch Day 2131 | |
| National Buttercrunch Day 2132 | |
| National Buttercrunch Day 2133 | |
| National Buttercrunch Day 2134 | |
| National Buttercrunch Day 2135 | |
| National Buttercrunch Day 2136 |