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<p>[QUOTE=&quot;Parthicus, post: 2547240, member: 81887&quot;]Re: the date of these coins:&nbsp; The standard Muslim calendar starts in the year of the Hijra (Muhammad&#039;s relocation from Mecca to Medina) in 622 AD.&nbsp; The Muslim calendar is lunar-based, with a&nbsp; year that is 354 days long, so you can&#039;t just add 622 to an AH (Hijra) year to get the AD equivalent- there&#039;s a formula to get an approximation, and charts you can look up to get the exact days in AD calendar that AH years start and end.&nbsp; The year 1323 AH is equivalent to 1905 AD (or more exactly, 1323 AH extended from March 8, 1905 to February 25, 1906.)</p><p><br /></p><p>However, starting in 1925 AD coins from Iran use the SH (Solar Hijra) calendar.&nbsp; The SH calendar stats with the Hijra year of 622 AD, but it uses the standard 365.25 day solar year, so one year of SH time is exactly equal to one year of AD time.&nbsp; The year 1323 SH is equivalent to 1944 AD, as the Krause catalogue says.&nbsp; Unfortunately, there is nothing on the coins to indicate whether the date is in AH or SH, you just have to know it based on the coin&#039;s other design (or else look it up in the catalogue).</p><p><br /></p><p>(For the sake of completeness, I should mention that from 1976 to 1978 yet another dating system was used, based on the establishment of the ancient Persian monarchy, with dates MS 2535 to MS 2537.&nbsp; The less said about it, the better.)[/QUOTE]</p><p><br /></p>

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