Hybrid Scientific Calendar (HSC)
Equal months, Perfect weeks, Global sync.
Today
Gregorian
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HSC
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Weekdays stay aligned, Intercalaris + Aevum sit outside the week.
Convert: Gregorian → HSC
Result
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Convert: HSC → Gregorian
Result
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Leap rule = Gregorian (÷4, centuries only if ÷400). Intercalaris: mid-year (leap only). Aevum: year-end (every year).
