# from https://github.com/python/cpython/blob/5849af7a80166e9e82040e082f22772bd7cf3061/Lib/test/datetimetester.py#L3104-L3226
2025-01-02
2025-01-02T03
2025-01-02T0304
2025-01-02T030405
2025-01-02T030405.678901
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2025-01-02T03:04:05.6789010
2009-04-19T03:15:45.1234567
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20250102T03:04:05.6
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2025-W01-4T12:14:31
2025-W01-4T12:14:31.012345
2026-W01-3T16:21:00
2026-W01-3T16:21:00.000000
2022-W52-7T20:21:59
2022-W52-7T20:21:59.999999
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2000-01-01T00+21
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2025-01-02T03:04:05,6+000000.00

# https://github.com/python/cpython/blob/5849af7a80166e9e82040e082f22772bd7cf3061/Lib/test/datetimetester.py#L3237-L3261
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2009-04-19T0a
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2009-04-19T03:15:4500:00
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2009-04-19T12:30:45.123-05:00a
2009-04-19T12:30:45-05:00a
