Celebrato nei paesi (+1):
Stati Uniti.National Buttercrunch Day negli altri anni
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| National Buttercrunch Day 2232 | |
| National Buttercrunch Day 2233 | |
| National Buttercrunch Day 2234 | |
| National Buttercrunch Day 2235 | |
| National Buttercrunch Day 2236 | |
| National Buttercrunch Day 2237 |