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From: R. Miriam bat Yosef
Subject: Gregorian bridge
Date: 29 Adar 5780
Gregorian Calendar Correspondence
Which direction is the correspondence?
We could define: given a date, produce the Gregorian equivalent. Or we could define: given a Gregorian date, produce the equivalent in our calendar.
The first says: our dates are primary, Gregorian dates are derived. The second says the opposite.
A "correspondence" claims symmetry. But the specification already takes a position. It defines dates. It does not define Gregorian dates. Our date is primary here.
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