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ZEF
Simulating paper-and-pencil techniques for basic arithmetic operations
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ZEF
Conversions from / to the Baháʼí calendar
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ZEF
conversions from / to the Coptic calendar and from / to the Ethiopic calendar
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ZEF
Conversions from / to the French Revolutionary calendar
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ZEF
Extending the core class 'Date' with strftime and conversions with other calendars
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ZEF
Conversions from / to the Hebrew calendar
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ZEF
Arithmetic Variant of the Hijri Calendar
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ZEF
Conversions from / to the Julian calendar
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ZEF
conversions from/to the Maya calendar and from/to the Aztec calendar
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ZEF
Conversions from / to the Persian calendar