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<p>[QUOTE=&quot;Sulla80, post: 3976152, member: 99456&quot;]Thanks all for sharing great examples of coins of Janus and 46 BC.</p><p><br /></p><p>A good question - the conversion I&#039;ve used for Roman dates to convert A.U.C. (ab urbe condita) to modern dates is overly simple: subtract 753 for AD years or 754 for BC years.&nbsp; This clearly doesn&#039;t get precise with days and months that could be very differently aligned to the solar year, and mapping to day of the month even more complicated.&nbsp; Here&#039;s what Smith says in <i>A</i> <i>Dictionary of Greek and Roman Antiquities:</i></p><blockquote><p><font size="4"><span style="color: #000000">&quot;It is extremely difficult, or rather quite impossible, to determine the actual dates, which correspond to the nominal dates of any events before the Julian reform of the calendar, especially after the irregularities introduced by the lex Acilia.&quot;</span></font></p><p><font size="4">-<a href="https://play.google.com/books/reader?id=Cu89AAAAYAAJ&amp;hl=en&amp;pg=GBS.PA343" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://play.google.com/books/reader?id=Cu89AAAAYAAJ&amp;hl=en&amp;pg=GBS.PA343" rel="nofollow">William Smith, A Dictionary of Greek and Roman Antiquities Vol 1 p343 3rd edition 1901</a></font></p></blockquote><p><br /></p><p>I hadn&#039;t considered this, but George Washington&#039;s birthday a good illustration, we celebrate on February 22, 1731 (Gregorian date) but when he was born it was called February 11 (Julian date) <font size="4">[<a href="https://www.archives.gov/legislative/features/washington" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.archives.gov/legislative/features/washington" rel="nofollow">Ref</a>]</font>.</p><p><br /></p><p>Happy New Year![/QUOTE]</p><p><br /></p>

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