Egypt 20 Qirsh silver coin? [solved]

Hello,

Is anyone familiar with this coin, please? This is one of my first coins and I thought it may be a 1323 (1905) Abdul Hamid II, but when I try to identify the dates I calculated 1324 (1906).
Thank you.

Hello and welcome,

Your coin has the ascension date of AH 1293 (1876), but to calculate the actual date we need the regnal year (31); so your coin is from 1905. Bear in mind the Islamic calendar isn't a solar calendar like the Gregorian one is, so dates don't line up exactly (e.g. you'd think 1876 + 31 means 1907, but it doesn't).

https://en.numista.com/catalogue/pieces28412.html

Thank you so much for the response and explanation CassTaylor - the difference in the calendars makes so much more sense! I'll have to revisit the Islamic calendar to learn more about the dates. Thanks!

The Numista catalog relates the 1293//31 to 1905
https://en.numista.com/catalogue/pieces28412.html
The NGC catalog does not attempt to make such an interpretation
https://www.ngccoin.com/price-guide/world/egypt-20-qirsh-km-296-1293-10-1293-33-cuid-1046909-duid-1240915

the reason is that new years day in the AH calendar does not correspond to new year in the Gregorian calendar
and there were in fact two new years days in the AH calendar, 1295 and 1296, in 1878! This happens once every 98 years or so.
check this out
http://worldcoingallery.com/Inst-ID/AH_to_AD.htm

edit to add, it took me 17 minutes to compose this answer!
beautiful coin btw.!

Mr Midnight, thanks so much for explaining - that's fascinating! I've bookmarked the link (thanks!) for easy reference; the comparison of the calendars is so much more detailed than I had appreciated. Lots to learn - starting now! (My grandad brought the coin back with him after his army service.)

It can get even more complicated and confusing near the middle of the precession.
In the 20th century, some Islamic countries under British or French mandates were issued coinage with both AH and AD years. Some modern Islamic countries also do this.
For example in 1926, AH1345 began on July 12th, pretty close to the summer solstice.
As a result, there are two different Tunesian 2 franc coins dated AD1926, one with AH 1344 and another with AH1345.

Mr.Midnight explained the topic far better than I could have! Bravo.