Another birthday problem

[George Berzsenyi]

Suggested by  Pierre Abbat on December 19, 2020:

Today is my birthday on the Hebrew calendar. Yesterday was my birthday on the
Gregorian calendar. I was born after sunset. How old am I?  

[t...@bellefleurbooks.com]

Dear George:

I am not sure why you ask this question. You give the date, December
19, 2020, which presumably is Gregorian and not Julian. Hebrew date
Tevet 4, 5781, ends at sunset on December 19, 2020, while Tevet 5, 5781,
begins at sunset. The day before this is December 18, 2020. The
question, then, is in what prior year do Tevet 4 or Tevet 5 fall after
sunset on December 18? A dreary linear search yields the following
results:

Gregorian December 18, 2001, is Hebrew Tevet 4, 5762, which would be age
19.
Gregorian December 18, 1993, is Hebrew Tevet 5, 5754, which would be age
27.
Gregorian December 18, 1974, is Hebrew Tevet 5, 5735, which would be age
46.
Gregorian December 18, 1955, is Hebrew Tevet 4, 5716, which would be age
65.
Gregorian December 18, 1936, is Hebrew Tevet 5, 5697, which would be age
84.
Gregorian December 18, 1917, is Hebrew Tevet 4, 5678, which would be age
103.

I hope someone finds this exercise entertaining. Am I missing
something? The following is a good website:

https://www.hebcal.com/converter?

Sincerely,

Tom

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[t...@bellefleurbooks.com]

Dear George:

My guess is that you did not intend for "December 19, 2020" to be part
of this riddle and that the date simply got added to the riddle by the
normal operation of forwarding an e-mail message. Thus, the original
riddle's answer was probably age zero.

Sincerely,

Tom