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new_start 

        # Date.new_start

(from ruby core)
---
    d.new_start([start=Date::ITALY])  ->  date

---

Duplicates self and resets its day of calendar reform.

    d = Date.new(1582,10,15)
    d.new_start(Date::JULIAN)         #=> #<Date: 1582-10-05 ...>

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